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Type: galaxy, Sc
Mag: B=10.85, V=10.18
Size: 5.623′ x 2.63′
Dunlop, J. (1828) A Catalogue of Nebulae and Clusters of Stars in the Southern Hemisphere, Observed at Paramatta in New South Wales. Phil. Trans. Roy. Soc., 118, 113-151. [1828RSPT..118..113D]
James Dunlop discovered this galaxy from Paramatta, New South Wales, and included it as No. 531 in his catalogue of 1827. Using a 9-inch f/12 telescope, he described it as "a long or rather elliptical nebula, about 2' long and 50 arcseconds broad, a little brighter in the middle, and well defined. There is a group of small stars on the north side."
John Herschel recorded it as "B, vL, mE, regular elliptic; resolved. I see severl small stars in it." On a second occassion he called it "vB, vL, mE, glbM, 5' long, 2' broad, pos 314 degrees, stars seen in it. Visible with moonlight and lamp illumination" His third observation was recorded as "vB, vL, vmE, gbM, 4' long. Taken as Dunlop 531 but too late for transit, the observation having been missed by relying on Mr Dunlop's place."
Doig, P. (1925) Notes on the nebulae and clusters in Webb's 'Celestial Objects for Common Telescopes' (Sixth edition, Vol.ii). Part V. M.N.R.A.S., 36(3), 89.
B, 3'x1', spiral.
The RNGC (Sulentic and Tifft 1973) notes that this is a 11.5 mag galaxy. Their coded description reads S,EL,HISB,DIF APP S ARM OR APP NP SIDE,MW CLOUDS NR.
Sanford calls it a "fairly bright 10th magnitude galaxy, elliptical in shape and 3' x 1' in size."
De Vaucouleurs (1956) "Survey of bright galaxies south of -35° declination", Mem. Mount Stromlo, No. 13. (photographic study, plates taken with the 30-inch Reynolds reflector, 20-inch diaphragm).
Houston observed this 10th mag 3'x1' spiral with 5-inch binoculars and "saw it immediately at 20x. It has a neighbour 2/3 degree away, very similar in size and shape but a bit fainter [NGC 1808]."
Steve Coe, using a 13" f/5.6, notes: "Pretty bright, pretty large, gradually brighter middle, elongated 2 X 1 in PA 165, there is a 13th mag star on the North tip of this galaxy and it is mottled at 100X."
Hartung notes: "Stars near the edge of this fine interesting field are fairly bright and contrast well with a bright elliptical nebula 3.5' x 1.5' in pa 135 degrees which is fairly well defined. It rises in brightness broadly to the central axis, and 7.5cm will show it."
05 05.3 -37 59
17.5: bright, large, elongated 2:1 NW-SE, 3'x1.5', pretty diffuse. Two
faint mag 14.5 stars are superimposed. Appears brighter along the W side.
8: moderately bright, moderately large, slightly elongated.
Tom Lorenzin, in the electronic version of "1000+ The Amateur Astronomers' Field Guide to Deep Sky Observing", notes: "10.7M; 3'x 1' extent; bright and oblong; little brighter center; N1808 is 40' to NE; both are good supernova prospects."
POSS: * just vis 0'.9 SW w/in halo; fntr * NW of it. * 1'.1 NW w/in halo.
br part in pa135. implies 15cm size 2'.25x~1'.
T&B: many *s.
15cm - very different character wrt N1808. mod broad concen overall w/o br cen struc. vconsp mottled throughout, remarkably clumpy. m14 * SW just outside brtst part but w/in vfntst extent of halo. another * m14.5 nr NNW tip, just w/in outer boundary. sl fntr overall but higher avg sfcbr than N1808. BS, 17Feb1990, LCO.
25cm - lg, br. elong SE-NW, 2'.5x1'. glittering spots along maj axis. smooth outline in a *ry fld. BS, Big Cypress.
8-inch Newtonian, 66x: 1995-01-25 "Comparing it with NGC 1808, I note it bigger, easier to see, but I am not sure of its form and PA." [Gabriel Giust, San Isidro, Argentina]
16-inch f/10 SCT (127x 290x 462x)
No real detail on the dusty surface only two stars embedded. Even the nucleus is not visible. Glimpse with averted vision define it slightly from the background with a cigar shape impression. Real high power displays the north-eastern edge of the galaxy to be slightly hazy.
Location: Pietersburg South 23o 53. East 29o 28.
Sky conditions: Clear.
Date: 4 Julie 1997.
Field of view: 52.7 arc minutes.
ASSA-DSO - Report J
NGC 1792 Mag 10 size 4
Large to medium, bright well defines elliptical galaxy, with a broad central nucleus, and maybe very faint extensions.
12-inch f/10 SCT (EP: 2-inch 40mm SW 76x 53' fov; 2-inch 32mm SW 95x 42' fov; 2-inch 14mm UW 218x 23' fov)
Appears reasonably large, though thin (2x1), and elongated in a northwest to southeast direction against an outstanding background. Broad central nucleus and soft wool-like outer edges which appears extended (218x). Faint stars are visible in the outer regions. Bennett 31 (NGC 1808) can be located 40' arc minutes to the north.
Sky Conditions:The fainter parts of the Milky Way are barely visible.Haziness only visible on the horizon.Atmosphere stable with little interference.
This galaxy has an oval-like shape almost looking like an out of focus rugby ball at 75x.This galaxy is seen as a pale glow of white light just seen on the brink of visibility.To note there are areas of even brightness visible all over this galaxy.This galaxy measures 3.7'x 2.6'.Chart No:174,NSOG Vol.1
12-inch Dobsonian f5 (EP: 20mm UW, 7mm UW)
Conditions: The fainter parts of the Milky Way are barely visible. Haziness only visible on the horizon. Atmosphere stable with little interference. Limiting Magnitude: 4.9.
NGC 1792 is a faint galaxy with a well-defined shape. Spiral structure is more difficult to discern in this faint galaxy. It is difficult to observe in the city. It has an elongated shape with some spiral structure. It is oriented South-South West. There are a few faint stars near the galaxy. There are no darker areas within the galaxy, but there are some areas of uneven brightness towards the outer structure of this galaxy.
Observing site: Fall Star Party
[5h 5m 12s, -37° 59' 0"] A bright, elongated(1:3), mottled, streak with hardly any nucleus. B: Sc.
The Messier objects
The Bennett objects
The Caldwell list
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