Planetary Nebula Jonckheere 900

Jonckheere 900
Jonckheere 900: Imate taken with Hubble Space Telescope, © 2012 ESA/Hubble & NASA, Josh Barrington [43]


This nebula was discovered on 8 October 1912 by Robert Jonckheere at Lille University Observatory while searching for new double stars. He noted: «It consists of a planetary nebula 3" in diameter with two stellar points which form a double star at 148.0° 2.17", 9.8 and 9.8 mag. The total luminositoy of the nebula is about 9.5 mag and it takes a fairly high magnification to recognise its non-stellar character. There is a 10.3 mag star at 193.2° 11.1".» [42]

Physical Properties

J 900 is a planetary nebula, small but fairly bright with a relatively evenly spread central region surrounded by soft wispy edges. The nebula appears to display a bipolar structure, where there are two distinct lobes of material emanating from its centre, enclosed by a bright oval disc. [43] Simbad lists apparent magnitudes in different bands: V 12.5; G 17.11; J 11.6; H 11.2; K 10.1. Distance is ~3.9 kpc. [145]

«Strasbourg-ESO Catalogue of Galactic Planetary Nebulae» Acker et al., 1992 [141]
Designations PN G194.2+02.5: J 900, PK 194+02.1, ARO 92, VV 28, VV'44
Right Ascension (J2000.0) 06h 25m 57s
Declination (J2000.0) +17° 47' 27"
Dimensions 9." (optical), 6." (radio)
Distance 2.0 kpc
Radial Velocity +47.2 ± 0.4 km/s
Expansion Velocity 18. (O-III) km/s
C-Star Designations AG82 63
C-Star Magnitude V: 17.8
C-Star Spectral Type WC ?
Discoverer JONCKHEERE 1916

Finder Chart

The nebula Jonckheere 900 can be found in the contellation Gemini. The best time for observation is in the months October through April.

Finder Chart Planetary Nebula Jonckheere 900
Planetary Nebula Jonckheere 900 in constellation Gemini. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Objects Within a Radius of 15°