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NGC 381 (791 of 18,816)

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NGC 381

NGC 381, C 0105+613, Cl Collinder 10, Ocl 317.0, COCD 14, VIII 64, GC 204

RA: 01h 08m 16s
Dec: +61° 35′ 42″

Con: Cassiopeia
Ch: MSA:49, U2:16, SA:1

Ref: SIMBAD, DAML02, Archinal&Hynes (2003), Skiff20080430-s

(reference key)

Type: open cluster, 31m

Mag: B=?, V=9.3

Size: 7′
PA: ?

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Sketches  (1)

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Historical observations

Caroline Herschel

Discovered by Caroline Herschel.

William Herschel (c.1784)

Synonyms: H VIII-064

Discovered in 1787 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a forming cluster of pretty compressed stars. Caroline Herschel discovered it in 1783."

Published comments

Trumpler, R.J. (1928)

Trumpler (Lick Obs Bulletin, Vol 14, No. 420) gives the diameter as 7' and the class as III 2 p.

Photo index

Photo Index by Jim Lucyk: Vehrenberg's Atlas of DS Splendors (3ed) p29.

Phelps, R. L. & Janes, K. A. (1994)

Phelps and Janes give the outer cluster radius as 3.17arcminutes and list the minimum number of cluster members as 71. They include a plotted image of the cluster. [Phelps, R. L. & Janes, K. A. (1994) "Young Open Clusters as Probes of the Star Formation Process. 1. An atlas of open cluster photometry" Astrophys. J. Suppl. Series, 90:31-82.]

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a 9.5 mag open cluster.

Modern observations

Ancient City Astron.Club (1980)

Listed by the Herschel Club, described as "Some 24 stars counted, large in size and fanning outwards. Yellow and orange-red stars stand out in this cluster with a number of bright stars seen in field of view. 8-inch, 48x."

Tom Lorenzin

Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes the mag as 11.0 and comments: "5' diameter; 40-plus faint members; 1.5 degrees NE of Gamma CAS; 35' to NW is OPN CL N366."

Brian Skiff

POSS: not concen on W or anywhere. dbl * is triple noted in 25cm with nrby

*.

WDS: Stein 185: 10.8,12.5; 8".1; 129. (V=11.0,13.1)

8cm - f circ spot w/a little broad concen. 5' diam. unres @ 20x. BS, 28Nov1983,

Anderson Mesa.

15cm - mod f `avg cl. 5' diam w/50 *s counted @ 140x. m11 * in N side is wide

un= pair. remainder m12.5+. unconcen. 50' fld shows patchy light & dk

areas in Milky Way bkgrnd. BS, 10Dec1990, Anderson Mesa.

25cm - 10' diam w/30 *s. W side condensed. quite f @ 90x.

- nice, 8'-10' diam, hazy @ 47x. on N center is un= triplet. mod concen and

irreg round.

30cm - 8' diam. seems to be a clot of bkgrnd *s. member *s m11.5+. 40 *s. vloose

w/a few strings. br m10.5 * 3' N.

Contemporary observations

Tom Bryant

2010 10 16 3:59:2

Observing site: Little Tycho Observatory

Telescope: C-8

[1h 8m 18s, 61 35m 0s] A round group of ~ 30 faint stars, 12-14mv. A chain of ~7 12mv stars runs NE-SW through it.

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