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NGC 7287 (17,247 of 18,816)

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NGC 7287

NGC 7287, NGC 7287A, ESO 602-20, LEDA 68960, LEDA 68959, SGC 222604-2227.5

RA: 22h 28m 48.6s
Dec: −22° 12′ 8″

Con: Aquarius
Ch: MSA:1379, U2:347, SA:23

Ref: SIMBAD

(reference key)

Type: galaxy pair, S0:

Mag: B=15.48, V=14.75

Size: 0.245′ x 0.169′
PA: 11°

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

NGC 7287 may be the double star listed in the main table. This is Howe's identification for an object found by Frank Muller with the 26-inch refractor at Leander-McCormick. His description fits Muller's except for the magnitude: Muller makes his object 15.0, while Howe puts his at 11.5 + 11.5 for a total of 10.7! The position angles are the same, though: 150 deg (Muller runs it on around the circle to 330 deg), as are the separations at 6 arcsec.

On the DSS, Howe's "double" is actually a triple in a line at PA = 145 deg, with the largest separation being about 12-13 arcsec. The magnitude, as nearly as I can judge it, is about half way between the two earlier estimates. So, this could well be Muller's object.

However, Dreyer has an interesting note in IC2: "Ho[we] says that the RA is about 2 minutes too great, and that the object is only a F D*, dist 6 arcsec. But he must have found a different object, as Burnham (Lick Obs, ii, p. 180) [which I have not seen] without noticing any great error in RA, gives Pos 60 deg, Dist 20 arcsec, and states that the p one is undoubtedly a nebula, while the f one may be a star."

Muller's published position falls in group of galaxies, one of which is a double with a star nearby roughly in the configuration noted by Burnham. I've included this in the main table, too, as it may be Burnham's object. This, too, could have been the object seen by Muller -- his telescope was certainly big enough to pull in the photons.

But with Howe's stars being brighter, near the 2 minute RA offset shared by several other of the Leander-McCormick nebulae, and with their sharing the correct description with Muller's original observation, I'm more inclined toward them. Hence, they have only one query in the table, while the galaxies and star that Burnham may have seen have two question marks.

Historical observations

Burnham, S.W. (1894)

Publ.Lick.Obs. Volume 2. "Observations of Nebulae with the 36-inch Refractor of the Lick Observatory", p 168.

I found two very faint objects about 20'' apart. It may possibly be a double nebula, but the following component seems to be a faint star only. The preceding one is undoubtedly a faint nebula. It is a littel brighter in the middle, giving it a stellar appearance.

Published comments

Sulentic & Tifft (1973)

(Sulentic and Tifft 1973) notes that this is a 15.0 mag galaxy. Their coded description reads ALMSTEL,USB.

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