Images de page

DESCRIPTION— {Continued)

An oval 1' long with bright central portion; some faint traces of spiral structure.

An oval with bright center, 1' x K3, in p.a. 105°, probably a spiral. This is near the center of a remarkable field which contains thirteen N. G. C. objects, and eighty-one other small and faint nebulae. 81 s.n.

A fairly bright, compact spiral l16xl'; bright, but not very sharp nucleus, which is quite asymmetrically placed.

The main whorl of this spiral forms an elliptical ring 315x1' in p.a. 95°; exceedingly faint matter outside brings the total length to nearly 8'. Bright, rather irregular matter in the vicinity of the nucleus, which is elongated and shows well in a 5m exposure. See Abs. Eff. 17 s.n.

Nearly round; 013 in diameter, with an almost stellar nucleus; a spiral.

Nearly round, 1' in diameter; central part very bright; no spiral structure discernible.

A very bright oval I'5x015; some slight indications of spiral structure.

About 016 long in p.a. 110°; bifid. See Abs. Eff.

Round, 0'3 in diameter; quite bright; structureless.

Very faint; slightly oval; 1' long; faint stellar nucleus; probably spiral.

A faint spindle 018 long in p.a. 80°; spiral.

Slightly oval; 1' long; a 0-type spiral with a bright stellar nucleus.

Bright spindle 1' long in p.a. 125°, with almost stellar nucleus.

Vol. VIII, Plate 34. M. 61. Nearly round; 6' in diameter; very bright. A beautiful spiral, with a very bright, almost stellar nucleus, and many almost stellar condensations in its open, somewhat irregular whorls. 40 s.n.

Nearly round; rather bright; 1'2 in diameter. A 0-type spiral with several almost stellar condensations in its main whorls, which form a nearly complete ring.

Bather faint; 214 x 015 in p.a. 170°. Nucleus and whorls indistinct. See Abs. Eff.

Vol. VIII, Plate 35. A bright, regular, nearly round spiral 5' in diameter. Very faint stellar nucleus surrounded by bright, short whorls, forming a central oval. The outer whorls are rather open, quite regular, and show many stellar condensations. Two novae have appeared in this spiral. M. 100. 15 s.n.

A spiral of the 0-type, 316 x 3', with a bright, rather large nucleus.

A spindle 2' x O14 in p.a. 30°; very bright; no spiral structure discernible. 28 s.n.

Planetary. 4 s.n.

Very bright; round, 1' in diameter. Center large. No spiral structure discernible.

Very bright oval, 4'x2'; very slight traces of spiral structure. M. 85. 14 s.n.

1'5 x 0'5 in p.a. 25°, with a large, bright center. The northeastern end is bifid, with a dark lane extending in to the nuclear portion; no lane is visible at the other end. No whorls discernible.

0'8x014; bright center; no spiral structure discernible.

An elongated, rather irregular spiral 3' x 0'4 in p.a. 90°. Nuclear portion fanshaped; an irregular dark lane along the major axis. See Abs. Eff.

An irregular spiral 118 x 018. A bright, somewhat irregular streak lies along the major axis in p.a. 100°. Most of the nebular matter lies at the ends of the major axis, and there is evidence of absorption on the northern side.

There is nothing in just this position, though there are several small nebulae near. The N. G. C. description accords best with a very small, moderately bright oval 9' n. and 2' w. of 4389. 31 s.n.

The inner and brighter part is 1'4 in diameter. Exceedingly faint outer whorls make the diameter about 4'. The nucleus is large and very bright. It is a good example of the 0-type spiral; the cross-arm is bright and the inner whorls extending from this nearly form a ring.

This appears to be an exceedingly faint, very large, and very irregular spiral, covering an area about 8' in diameter; many almost stellar condensations; no true nucleus. 27 s.n.

Very faint; 3' x 015 in p.a. 88°; a patchy, irregular, edgewise spiral with an irregular dark lane down the middle. See Abs. Eff.

Slightly oval, 2' long; bright center, which is not stellar in short exposures; no spiral structure discernible. 5 s.n.


Patchy, quite irregular spiral 1'5 x 0'5 in p.a. 10°. Fainter along its western edge; no true nucleus. The position is for 4409, while the description accords with that for 4420; there is no object in the position given for 4420.


DESCRIPTION— (Continued)

Probably a faint, small oval with brighter center and slight traces of spiral character.

Moderately bright spiral 3'xl15 in p.a. 20°. Some evidence of absorption

effects on the eastern side. A star of magn. 15 near the nucleus. See Abs. Eff. 2' x 015 in p.a. 18°; moderately bright center; no spiral structure discernible. A fairly bright spiral 3'x 1' in p.a. 80°; bright, rather large nucleus; a very

clearly marked absorption lane on the northern side. See Abs. Eff. 34 s.n. Spiral 3'x 1' in p.a. 90°; nucleus moderately bright; whorls are vague and

indistinct; absorption effect on southern side. A very bright and interesting object, filling a space about 315 x 2'. It is of

exceedingly irregular structure, with many almost stellar condensations,

and a bright, nearly stellar nucleus. Of spiral type as to nebulosity, but

with very little evidence of spiral form. Quite bright; slightly oval, 013 long; no spiral structure discernible. Faint oval 013 long; slight evidence of spiral structure. Faint, narrow oval 018 long; no nucleus discernible; probably spiral. Very small bright oval; almost stellar. Rather faint 0'7x015; has a faint nucleus; irregular; the whorls form a nearly

complete oval ring. The very bright nucleus is not stellar; shows well in a 3m exposure. Nearly

round, 2' in diameter, fading out rapidly toward the edges. No structure

discernible, though spiral character is suspected near the center in the

short exposures. 28 s.n. Slightly oval, 015 long; quite bright at center; no structure discernible. Nearly round; 015 in diameter; bright, almost stellar nucleus. A star of magn.

15 is distant 11" in p.a. 352°. Structureless. A faint oval spiral I18x019; faint, small nucleus; compact, indistinct whorls. Exceedingly bright; the sharp nucleus shows well in 5m exposure. The brighter

central portion is about 015 In diameter, and the total diameter about 2';

nearly round. No spiral structure is discernible. A curious straight ray

lies in a gap in the nebulosity in p.a. 20°, apparently connected with the

nucleus by a thin line of matter. The ray is brightest at its inner end, which

is 11" from the nucleus. 20 s.n.

Vol. VIII, Plate 36. These appear to be physically connected; 4485 is a bright

irregular oval 1' long. 4490 is 4' x 118 in p.a. about 112°. Very bright, with

numerous almost stellar condensations; a very irregular spiral. See Abs.

Eff. 15 s.n. Narrow oval 115 x 014 in p.a. 150°; moderately bright, almost stellar nucleus;

probably a spiral. Nearly round, 014 in diameter; rather bright, almost stellar nucleus; slight

traces of spiral character. This object consists of two faint nebulae whose centers are V apart. Both

are rather irregular spirals; the northern object is slightly oval, 115 long;

the southern 015 in diameter, nearly round. There is no certain evidence

of any occulting effect due to overlapping. 15 s.n. A narrow, almost linear strip of nebulosity 016 long. Vol. VIII, Plate 37. A bright, beautiful spiral 5' x 215 in p.a. 140°. Bright,

elongated nuclear region, including a bright, almost stellar nucleus. The

whorls are rather close, and show numerous condensations. 17 s.n. Faint spindle 2' long in p.a. 38°.

A fairly bright, very irregular patch of nebulosity about V in diameter.
Faint, small, round, 018 in diameter; brighter center; probably spiral.
An exceedingly faint, irregular spiral, about 3' x 2'.
Narrow oval, with brighter center and small nucleus, 1' long; spiral.
10'x 1' in p.a. 84°. Rather faint; an edgewise spiral with an irregular dark

lane down the middle. See Abs. Eff. 17 s.n. A spindle 015 long; brighter center; probably spiral. 5'x 1' in p.a. 112°; very bright central portion with a somewhat elongated

nucleus, near which is a clear-cut, curved absorption lane. No whorls distinguishable. See Abs. Eff. 17 s.n. A fine, rather bright spiral 5'x 112 in p.a. 70°; nucleus sharp; some evidence

of absorption effect on the north. A nova appeared in this spiral shortly

before March 20, 1915. See Abs. Eff. 13 s.n. Rather faint spindle 115 long in p.a. 160°; no nucleus discernible; doubtless



DESCRIPTION— (Continued)

N.G.C. o S v'

4536 12 29.3 + 2 44 Vol. VIII, Plate 38. A fine bright spiral 7' x 118 in p.a. 122°. Bright nucleus;

two main whorls, with several condensations; evidence of a short curved absorption lane near the nucleus. See Abs. Eff. 25 s.n. 4535 12 29.3 + 8 45 A beautiful, rather open, two-branched spiral, with a bright, almost stellar

nucleus. 6'x 3' in p.a. 30°; two regular, well separated whorls, showing numerous almost stellar condensations. II 3568 12 30.4 +83 7 Planetary. 0 s.n.

4546 12 30.4 — 3 14 115x015, with a round, very bright central portion; no nucleus or whorls discernible. 7 s.n. 4559 12 31.0 +28 31 Vol. VIII, Plate 39. A bright spiral 8'x 2' in p.a. 136°. Faint, almost stellar

nucleus; numerous condensations in the rather irregular whorls. 26 s.n. Faint, indistinct spiral 2' x 015 in p.a. 45°.

A spindle V.2 long in p.a. 45°; the central portion is round and very bright; no nucleus or whorls discernible. 4565 12 31.4 +26 32 Vol. VIII, Plate 40. 15'x 111; the largest and most beautiful example of an

edgewise spiral with dark absorbing lane. This runs down the central line, just north of the nucleus, which is bright and almost stellar. P.a. 134°. Several almost stellar condensations. See Abs. Eff. 51 s.n.

±rf.l\ 12 31.5 +11 48 Two rather faint spirals so close together that they overlap slightly. The 'centers are 112 apart in p.a. 165°. The northern nebula is 2'xl'; the

southern 3' x 1'. The northern nebula has a very bright, almost stellar nucleus; that of the southern nebula is double. Both are rather open spirals with many almost stellar condensations. There is apparently a slight amount of occulting effect, due to overlapping. See Abs. Eff. 42 s.n. 4594 12 34.8 —11 4 7'xl15 in p.a. 92°; very bright. A remarkable, slightly curved, clear-cut dark

lane runs along the entire length to the south of the nucleus; probably the finest known example of this phenomenon. There are very slight traces of spiral whorls. See Abs. Eff. 11 s.n. 4605 12 35.6 +62 10 A bright, quite irregular and patchy nebula 3'x 1' in p.a. 116°; no nucleus

'apparent. Evidence of absorption effect on the northern side. Doubtless a very irregular spiral. 4618 12 36.8 +41 42 A very irregular nebula covering an area about 215 square. Many almost stellar

condensations. Quite bright. Of spiral type; probably an exceedingly
irregular spiral. 8 s.n.
A small, rather faint, single whorled spiral 1' in diameter, nearly round.
A faint, slightly oval nebula just n. of 4631; very indistinct spiral. VA long.
Vol. VIII, Plate 41. Very bright; it is 12' x V.2 in p.a. 86°. Numerous almost
stellar condensations, and a very irregular absorption lane extending through-
out most of its length. A bright, irregular mass 1' e. of the center of figure
may be the nucleus. See Abs. Eff. 15 s.n.
Bright spindle 017 long in p.a. 130°; no spiral structure discernible.
Nearly round, 1' in diameter; moderately bright, almost stellar nucleus; the

whorls form a faint ring.
A faint, rather compact spiral 2' x 016 in p.a. 40°.

Nearly round, 2' in diameter; a faint, rather patchy spiral, with an almost stellar nucleus. 4649 12 38.6 +12 6 2< in diameter, growing rapidly brighter to a very bright central portion, which

shows no true nucleus in short exposures; no spiral whorls discernible.

4653 12 38.9 — 0 1 A very faint, slightly oval spiral 2'x l15; nucleus faint and rather large; whorls

regular, but very faint.

4654 12 38.9 +13 40 A very faint, somewhat irregular spiral 3' x V.2 in p.a. 125°. Faint, small

nucleus. Most of the matter is in one whorl.

4^"5| 12 39.1 +32 43 These form a single nebula, 9' long by about 1'wide, in p.a. 33°. The northern 'end corresponds to 4567; is very bright; sharply curved, and shows several

almost stellar condensations. The southern half, southwest of the apparent nucleus, is quite faint, as though obliterated by absorbing matter. Description in 4656 in Bull. 219 in error.

012 in diameter; bright, round, structureless.

1' x 014 in p.a. 95°. Very bright central portion; nucleus elongated and small. Very slight traces of spiral character. 17 s.n. 4666 12 40.0 +0 5 Bright spiral 4'x 016 in p.a. 45°. Nucleus bright and elongated; numerous

almost stellar condensations. Well marked absorption effect on southeast side. See Abs. Eff. 8 s.n.


A rather faint oval 0'8 x 0'A; a compact, irregular spiral.

A rather faint spiral 3'x2'; faint, almost stellar nucleus. Most of the matter is in one whorl, which forms a nearly complete oval ring. 4 s.n.


DESCRIPTION— {Continued)

3'x 017 in p.a. 68°. Bright, almost stellar nucleus; slight trace of spiral

whorls. 7 s.n. Bright, narrow spindle 315 long in p.a. 28°. Nucleus is very faint. There is a curious irregular absorption lane extending along the middle for 015 on each side of the nucleus. See Abs. Eff. 7 s.n. A faint spiral 2' x 018 in p.a. 170°; faint, almost stellar nucleus. Vol. VIII, Plate 42. A beautiful spiral 5' x 4' in p.a. 38°. Nucleus very bright; the whorls are on the periphery of the nebula, there being none near the center. A wide faint band of matter lies along the major axis of the nebula; an excellent exemplar of the 0-type spiral. Whorls show a number of almost stellar condensations. 19 s.n.

4736 12 46.2 +41 40 Vol. VIII, Plates 43 and 44. M. 94. A beautiful object. From the very bright,

large nucleus spring many bright, closely packed whorls, forming a bright inner oval 2' x 1'5 in p.a. about 110°. These inner whorls show many stellar condensations, whose sharpness and proximity to the nucleus would seem to make this one of the most favorable examples known for the investigation of motion in spirals. Fainter, closely packed, rather uniform outer whorls bring the nebula to a size of 5' x 315. 17 s.n.

4742 12 46.6 — 9 55 1' long in p.a. 80°; considerably elongated, with very bright round central portion. No spiral structure discernible.

4747 12 46 9 +26 18 A rather faint spiral 3' x 015 in p.a. 30°. Irregular line of brighter matter along

the major axis, and evidence of an absorbing lane southeast of the nucleus.

4757 12 47.7 — 9 48 Narrow spindle 1' long in p.a. 40°, with bright, small, central portion; structureless.

4760 12 47.9 — 9 57 Round; 015 in diameter, growing rapidly brighter toward the center; no spiral

structure discernible.

4766 12 48.2 — 9 49 Non-existent.

4781 12 49.2 —10 0 A moderately bright spiral 3'x 1' in p.a. 110°; quite irregular and patchy; no

nucleus. 15 s.n.

4784 12 49.4 —10 5 Narrow spindle 1' long in p.a. 105°, with round bright nucleus; no spiral structure discernible.

4790 12 49.6 — 9 42 An irregular, slightly oval spiral 1' long, with a fairly bright, almost stellar


4799 12 50.2 + 3 27 Nothing in this position. The N. G. C. description is "cF, S, vS* att." There

is a small, bright spindle at 12J1 51n>2, +3° 19', with a star of magn. 15 s.f. o18.

4'o-m( 12 50.8 +3 5 Two very irregular, elongated, faint patches of nebulosity; both are probably 'exceedingly irregular spirals. Their centers are about 40" apart in p.a. 170°.

The northern nebula is about 1' long; the southern 015, and their major axes are in position angles of approximately 60° and 160°, respectively. No certain evidence of any occulting effect due to overlapping. No nucleus discernible in either nebula. 17 s.n. 4826 12 51.8 +22 14 Vol. VIII, Plate 45. The central portion of this fine nebula is very bright, and

there is a bright, almost stellar nucleus. It is 8'x 4' in p.a. 110°. The whorls are rather compact, and of very uniform texture, without irregularities or condensations. The most striking feature of this spiral is the somewhat irregular, but very clear-cut, absorption area on the north of the nucleus. See Abs. Eff. 2 s.n.

12 55 +28 30 This region contains the most remarkable aggregation of closely packed small

nebulae known to me. About thirty are catalogued in this area in the N. G. C, and some twenty-five more are given in N. G. C. II. In reality there are more than three hundred small nebulae in an area about 50' x 40', a large proportion of which are probably spirals. None of them are conspicuous objects. They are so numerous that it is very difficult to locate those catalogued in the N. G. C. with any certainty, except for a few of the brighter objects. See figure 3. 304 s.n.

Quite irregular; 112 long; binuclear.

A small 0-type spiral 115 long; stellar nucleus.

A very bright spiral 5'x V.5 in p.a. 68°; bright, elongated nucleus. The whorls are somewhat patchy, and show a few condensations. Several well-marked dark lanes on the s. See Abs. Eff. 17 s.n.

Faint; 2' x 0M in p.a. 30° N. G. C. R. A. wrong.

A narrow spindle 1'5 long; brighter center; probably spiral.

A fine, bright globular cluster 10' in diameter. M. 53. 19 s.n.

A fine, rather open spiral 6' x 3' in p.a. 175°. The nucleus is very bright, almost stellar, and the portion near the nucleus is fan-shaped. The outer whorls are rather faint, with a few almost stellar condensations. Well-marked absorption effects on western side of major axis. See Abs. Eff.


_-. , DESCRIPTION— (Continued)

N.G.C. o o v'

5055 13 11.3 +42 34 Vol. VIII, Plate 46. A bright, beautiful spiral 8' x 3' in p.a. 98°. Has an almost

stellar nucleus. The whorls are narrow, very compactly arranged, and show numerous almost stellar condensations. See Abs. Eff. 33 s.n.

5144 13 20.0 +71 2 This is not a planetary; its spectrum is continuous. It is about 015 in diameter,

of unusual structure. There is no nucleus; the nebula matteT is arranged in a three-branched effect, much like a short letter Y.

5139 13 20.8 —46 47 a Centauri cluster. Taken with the D. O. Mills Reflector, Santiago Chile; reproduced in Vol. II of See's Evolution of the Stellar Systems, Plate 1.

r19r| 13 25.7 +47 43 Vol. VIII, Plate 47. The beautiful spiral M. 51 in Canes Venatici. Including "195J very faint matter to the north of 5194, scarcely visible in any of the very

numerous published reproductions, it covers an area about 12' x 6' in p.a. approximately 30°. A sharp stellar nucleus in 5194, and the whorls show a multitude of stellar condensations. The satellite nebula, 5195, has a bright, elongated nucleus; its nebulosity is of a more diffuse type, without discernible spiral structure, and with several rifts which suggest absorption effects. See Abs. Eff. 22 s.n.

A bright and unusually beautiful spiral 10' x 8'. The nucleus is 20" in diameter and very bright; in a 2m exposure it shows as a faint disk with a bright peripheral streak or whorl. A large number of almost stellar condensations in the rather open whorls of this fine object. See figure 7. 18 s.n

A fine bright spiral 5' in diameter; nearly round. Very bright, somewhat irregular nuclear portion; the two main whorls show numerous stellar condensations. Rather open, two-branched spiral. 17 s.n.

A fine bright spiral 312 x V.A in p.a. 140°. Very bright, elongated nuclear portion 0'.3 in length, a confused mass of bright nebulosity involving numerous closely packed stellar condensations. Numerous almost stellar condensations in the two bright, open whorls.

Vol. VIII, Plate 48. M. 3. The main portion of this very beautiful globular cluster is about 8' in diameter. 1 s.n.

A spiral 3' x 016 in p.a, 40°, with bright, rather small nucleus. The whorls are very indistinct. 6 s.n.

A rather faint 0-type spiral 1' in diameter; nucleus is moderately bright.

015 in diameter, with bright center; no spiral structure discernible.

A fine, moderately bright, two-branched spiral 115 in total length. Bright, almost stellar nucleus. See Abs. Eff. 23 s.n.

A rather irregular spiral 2'x 1' in p.a. 0°; almost stellar nucleus. Wide dark lane on western side.

Vol. VIII, Plate 49. M. 101. This unusually beautiful spiral is about 16' in diameter. There is an almost stellar nucleus, with two bright condensations very close which give it a tri-nuclear appearance. The open whorls show a multitude of stellar condensations. 5449, 5450, 5451, 5453, 5455, 5458, 5461, 5462, are simply brighter knots in the great nebula. 10 s.n.

A faint, indistinct spiral, slightly oval, 1' long; faint, almost stellar nucleus.

4'x 016 in p.a. 170°; an elongated, bright, rather patchy spiral; no true nucleus. 15 s.n. 5506 14 8.0 — 2 44 A rather faint, irregular spiral 2'x 015 in p.a. 90°; rather bright stellar nucleus.

Absorption lane down the middle. See Abs. Eff. 7 s.n.

Round; bright; 013 in diameter; structureless.

Edgewise spiral 6' x 016 in p.a. 115; central portion is brighter, but no nucleus is apparent. See Abs. Eff. 47 s.n.

Two small nebulae 015 apart in p.a. 75°. 5544 is 013 in diameter, with a bright stellar nucleus; no spiral structure apparent. 5545 is a spiral 1' x 012 in p.a. 70°, with a small faint nucleus. Though nearly in line with the major axis of 5545, it does not appear that 5544 is physically connected with it. 10 s.n.

5557 14 14.2 +36 57 Round; 0'A in diameter, with a very bright and rather large nucleus. A star

of about magn. 15 is projected on the southeastern edge of the nebulosity.

5560 14 15.0 + 4 27 Faint, elongated spiral 115 x 014 in p.a. 98°. Elongated nuclear portion; no


5566 14 15.3 + 4 25 Very bright oval nucleus; whorls make a faint oval 116 x 018 in p.a. 30°, and

are considerably fainter at the ends of the major axis. Exceedingly faint condensations. Moderately bright. 5 s.n.

5569 14 15.5 + 4 28 An exceedingly faint, slightly oval spiral 1' long; 3' n. of the N. G. C. position.

5673 14 28.1 +50 23 A rather faint spiral 115 x 015 in p.a. 135°; rather compact; no definite nucleus. 11029 14 29.0 +50 21 A spindle 3'xO'A in p.a. 152°; nucleus moderately large and quite bright; evidence of absorption lane on western side. See Abs. Eff.

5678 14 29.2 +58 22 A rather bright, compact, patchy spiral 216 x 1' in p.a. 5°; bright, almost stellar

nucleus. A few rather hazy condensations. 15 s.n.

« PrécédentContinuer »