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NGC 2167 (4,079 of 18,816)

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NGC 2167

NGC 2167, SAO 132848, IV 44

RA: 06h 06m 58.54s
Dec: −06° 12′ 8.9″

Con: Monoceros
Ch: MSA:276, U2:271, SA:11

Ref: Corwin (2004)

(reference key)

Type: bright nebula

Mag: B=6.6, V=?

Size: 4′
PA: ?

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

NGC 2167 is probably SAO 132848; it is certainly not H IV 44. This error comes from JH who equated his own h378 with his father's "planetary" more than 10 arcmin south-following his (JH's) position. Dreyer followed JH in NGC, but when he prepared WH's papers for their re-publication in 1912, he realized that WH's description as well as position did not agree with JH's. Dreyer gives some additional information in his note in WH's Scientific Papers, and also suggests there that WH actually observed a nebulous star about 70 seconds of time following JH's position. This suggestion was the source of my own comment in the preliminary version of ESGC that the RA of N2167 is 1 minute of time too small.

I think now that Dreyer and I were wrong. The description of IV 44 fits IV 19 = NGC 2170 very nicely, and the RA's are the same. The Dec's are about 8 arcmin different, and IV 19 was not seen in the sweep in which IV 44 was found. Therefore, it is likely that the only error in NGC is calling N2167 "IV 44."

Is there, however, a problem with JH's observation? The star at his position has almost no trace of nebulosity around it. Yet JH does not mark the position as uncertain, and that position is within 20 arcsec of the true position of the star. And JH calls it a "star 7 m;" its V magnitude is 6.9. By contrast, the star in NGC 2170 is 9th magnitude, and the star that Dreyer suggested as IV 44 is 11th magnitude. Perhaps there is a trace of nebulosity hiding in the overexposed image of the bright star. A close visual examination is needed.

Historical observations

William Herschel (c.1784)

Synonyms: H IV-044

Discovered in 1786 by William Herschel with an 18.7-inch f/13 speculum telescope. He called it "a star involved in milky chevelure." In the Notes to the 'Catalogue of a Second Thousand of New Nebulae and Cluster of Stars' a comment reads: "occurs only in Sweep 640, 2 minutes preceding, 4' north of IV.38: 'situated between two stars with a third star at rectangle to the former.' This cannot be h.378 (as hitherto assumed), nor does the description quite fit IV.19, which does not occur in this sweep, though this star has a star 11th mag ssp and a vF star north and a third father off npp. But 70 seconds following h.378 on the same parallel there is a star 11th mag between two others sp and nf with a third star preceding forming a striking rectangular triangle. If this is H's object, his RA is 33 seconds too small."

Birr Castle/Lord Rosse

Observations with the 72-inch f/8.8 speculum telescope at Birr Castle noted "Dec 11, 1850. I saw no nebulosity round NGC 2167. . ."

Burnham, S.W. (1894)

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

[Noticed while observing 2182]

"No 2167 is descrbied as 'a star 7m with a pretty strong nebulous atmosphere.' I could not see any difference between this and other stars of similar magnitude in the neighborhood. I have sometimes thought that all of the stars in this region of the heavens had a glow about them not generally found elsewhere, but this may be only optical or imaginary."

Published comments

Helwan Obs. Bulletin No 15 (1915)

No nebulosity shown round BD -6°1412.

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a nonexistent object. Their coded description reads NO NEB DC.

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