NGC 2467, sometimes called the Mandrill nebula, is ionised by the ultrahot O3 V star HD 64568
, the O6 IV subgiant HD 64315
, and the B0 V star LSS 830
, according to Avedisova. Besides the NGC 2467 star cluster itself, it includes the star clusters Haffner 18
and Haffner 19
. The bright foreground star on the far left of the image is the B8 IV subgiant HD 64455
It lies in the direction of the Pup OB1
and Pup OB2
associations (which overlap in the sky
A good image of NGC 2467
is available in several resolutions from the European Southern Observatory. (Note: the ESO image is rotated 90 degrees, with north to the right.)
RCW 16 includes the star clusters Haffner 18ab and Haffner 19. The ionising star is the O6 HD 64315. [1
This region is probably ionised by the O6 star HD 64135. [2
Haffner 18 is the superposition of two clusters at different distances, one at 4500 parsecs and one between 9500 and 11400 parsecs. Haffner 19 lies at a distance of 6400 +/- 600 pc. [3
] This implies that only part of Haffner 18 is actually associated with the nebula.
1. ^ Pismis, P. & Moreno, M. A. (1976). "Internal motions in H II regions. III.
The nebular complex NGC 2467.", Revista Mexicana de Astronomia y
Astrofisica, Vol. 1, 373-380. [1976RMxAA...1..373P]
2. ^ Persi, P., Ferrari-Toniolo, M., Spinoglio, L., et al. (1987). "Near-IR
observations of Sharpless regions. I - S269, S271, S307 and S311",
Astronomy and Astrophysics Supplement Series, Vol. 70, 437-442.
3. ^ 2010A&A...511A..38V