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NGC 6784 (15,728 of 18,816)

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NGC 6784

NGC 6784, NGC 6784A, AM 1921-654, ESO 104-55, LEDA 63210, SGC 192142-6543.4, h 3790, GC 4489

RA: 19h 26m 33.7s
Dec: −65° 37′ 24″

Con: Pavo
Ch: MSA:1519, U2:456, SA:26

Ref: SIMBAD

(reference key)

Type: galaxies (interacting), S0+S0

Mag: B=14.79, V=?

Size: 1.23′ x 0.602′
PA: ?

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

NGC 6784. There are two galaxies of virtually equal magnitude and diameter here, separated by 4.6 seconds of time, and 30 arcsec -- the orientation is southwest-northeast. Which one did JH see?

He has three observations of his nebula and records it as "eeF" all three times. He made only two firm measurements of its position, however (about the third, he says, "No RA observed, and the PD not to be put in competition with those of regular observations."). These are separated by 8.2 seconds and 68 seconds. Is it possible that he measured a different galaxy each time?

Unfortunately, this is an unanswerable question since the orientation of his two observations is northwest-southeast. So, while it's tempting to speculate about this (and speculate I have), I don't think we can say anything definite here. Thus, I've attached the number NGC 6784 to both galaxies.

Historical observations

John Herschel (1847) Cape Observations

Discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "eeF, S, has one or 2 stars 9m 5 or 6' distant." On a second occassion he called it "eeF, pL, among small stars." His third record reads "Viewed; eeF, but it is a nebula."

Published comments

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a unverified southern object.

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