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RA: 10h 09m 20.91s
Dec: −80° 51′ 30.7″
Ch: MSA:1024, U2:465, SA:25
Type: planetary nebula
Mag: B=?, V=?
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It was discovered by Sir John Herschel at the Cape of Good Hope with an 18-inch f/13 speculum telescope. He recorded it as "planetary nebula, pretty bright, not quite uniform in its light, having two brighter patches, slightly elongated towards a star A; slightly hazy; diameter = 15 or 18 arcsec (in RA 13 seconds of time). Pos of star A = 265.7 , dist = 0.7 diam from edge, 11th mag.; star C pos = 210.7 , dist = 1.75 diam from edge (NB 13 seconds in time = 33.75 arcsec in arc)." His second observation recorded it as "Planetary nebula, round or very slightly elongated; a very little hazy at the edges but still pretty well defined with 240 power. Viewed long and with much attention, being a very remarkable object. I am positive of the existence of two brighter portions near the edges. Companion stars A = 11th mag, pos = 274.7 ; star B = 13th mag, pos = 271.5 ; star C = 14th mag; 204.8 . The star A precedes the centre 14 seconds, which is also the diameter in RA of neb."
A photographic survey of bright southern planetary nebulae. M.N.R.A.S., 110(5), 429-439.
"We find an oval nebula with central star. There are two sectors of great brightness on the oval to east and west, and faint extensions in the form of a ring to north and south. Dimensions about 44''x33''."
Sanford notes that it is "38 arcseconds in diameter but at magnitude 12 requires a telescope with at least a 4-inch aperture to be appreciated."
From: "Neat Southern Planetaries - V."
NGC 3195 Cha (He2-44/ SA2-57/ PK 296-20.1) (10093-8051) lies 2O from the southern border of Chameleon and Octans, and can be found exactly halfway between the 5th magnitude stars Delta 1 and Delta 2 ( 1, 2) Cha and Theta ( ) Cha. The field contains few bright stars, however, aperture does not reveal many more. Discovered by John Herschel in 1835, the planetary is fairly bright and large. AOST1 and 2 both state that is "easily seen in a 10.5cm., but the prism image in 15cm." The visual magnitude is given as 11.6, while the photographic magnitude is stated as 11.5. In size the diameter has been stated as between 42" to 44"sec.arc. Burham's Celestial Handbook states 40"x30"sec.arc. AOST2 states little difference in all respects except in the diameter of 30"sec.arc. According to my visual estimates, the apparent diameter is closer to the 40"sec.arc. mark. The shape is ovoid along the axis PA 170O/350O. I like this planetary because it is so bright. An O-III filter definitely enhances this object, and with high magnification the disk also appears mottled. Visually, the overall surface brightness across the disk is even that shows little structure, reflected in the Vorontov-Velyaminov classification of Type III. Along the southern outer boundary, the planetary has a slightly 'wavy' appearance seen in apertures above 20cm.
Spectroscopy has revealed (AJ 334, pg.842 (1992)) that the planetary is approaching us at a radial velocity of +17±3 kms-1, with the nebulosity expanding at about 40 kms-1. Total mass of the nebulosity is estimated to be about 8.6% that of the Sun. The PNN is magnitude 15.3, but is obscured by the nebulosity in all amateur telescopes.
Distance is estimated to lie between 1.6 and 1.8 kpc., though the more recent estimates are 1.67 kpc.
I you haven't looked at this object - I am sure you will not be disappointed.
The Surrounding Field of NGC 3195.
by Jim Lucyk: Burnhams V2 p1174, Ast.Obj.for South.Tel. (Hartung, 1984).
(Sulentic and Tifft 1973) notes that this is a planetary nebula.
Hartung calls it "round, about 30 arcsec across, even in light and bluish with a single prism image. The field is scattered with stars on a very faint ground, four of them being near the nebula. It is clear when once seen with a 3-inch."
ASV Journal Vol 24 No 3 June 1971: "faint, small, round and blue in 12.5-inch 150x."
QBS: 50"x36" in pa20:. m12* 0'.7 W. neb annular w/br arcs E&W. cen * f.
15cm - mod br circ neb vis in deep twil @ 50x w/o diff. gradual contrast
improvement going from DS to UHC to [OIII]. 195x: circ, 25" diam. m12 *
off W side, neb reaches 1/3 way to *. wkly annular w/brtr arc on E
periphery, where there is br spot w/occas *ing. cen * (?) occas vis.
BS, 18Feb1990, LCO.
1997 October 28, Tue/Wed: Jonkershoek, seeing 3, transparency 3, sky darkness 4, lim.mag. at south pole 6.0 (naked eye), 10.7 (binoculars). 11x80 tripod-mounted. "Not seen."
1998-03-01/02, 6-inch f/8.6 Newtonian, Die Boord. 5.6 (naked eye), seeing average.
In low-power sweeper, the image of the planetary blurs into that of the star to its north-west, resulting in a small, mottled faint nebulous glow. Easy in sweeper with attention. At higher powers, nebula and star(s) clearly separated, the planetary appearing as a small (about 50 arcsec) round glow, quite faint, no detail or colour visible. North-west is a small star (10.5), and straight on is a fainter one (11). West of the nebula is another 11th mag one. (rough sketch made in obs notes).
RA: 10h09m24s - DEC: -80o52'.4 - Magnitude: 11.6 - Size: 42"
Tel: 12" S/C - 218 - 346x - Date: 14 June 2009 – Vis: 5.4
With high power I could glimpse a small uneven darker inner halo, but just!
16-inch f/10 SCT (102x, 290x)
An appreciable soft, round mistiness can be observed through the 16" Schmidt-Cassegrain with a 101 magnification. The northeast section of the star field, 26 arc. min., is sparsely populated with stars. A few stars of approximately 9 to 12 magnitude underline the south side of the planetary nebula and is spotted with faint stars from east to west. With a magnification of 290, field of view 17.4' slightly more of its characteristics come to the fore. Displays a bleak grey white colour. More evidently defined toward the west side in contrast with the eastern portion, which appears washed-out. When employing a oxygen filter I can see that the middle section is slightly darker which would indicate that the planetary opens inwards. Approximately 30 arc. min. north of NGC 3195 I could locate the galaxy NGC 3149, and with a magnitude of 13.1 it appeared as a soft smudge without any detail. Between these two deep sky objects is a beautiful double star both displaying the colours of yellow and orange.
The Messier objects
The Bennett objects
The Caldwell list
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