This faint nebula, ionised by the O9.5 V star BD +60 2607
, forms part of the Cas OB5
supershell. Avedisova places it in the star formation region SFR 114.63-0.79
along with a water maser, the radio source KR 82
and the young stellar object Mol 160
Russeil combines Sh 2-163, Sh-164 and Sh 2-166 into a single star formation region.
A recent Spitzer study
concluded that Mol 160 is 3000 times more luminous than the sun, is accreting matter from a 220 solar mass dust cocoon and has not yet undergone hydrogen fusion.
Russeil combines Sh 2-163, Sh-164 and Sh 2-166 into a single star formation region. [1
] This is a little odd however as she also cites widely varying distance estimates for these nebulae.
The ionising star is the O9.5 V BD +60 2607. [2
At the edge of the Cas OB5 supershell.[3
1. ^ Russeil, D., Adami, C., & Georgelin, Y. M. (2007). "Revised distances of
Northern HII regions", Astronomy and Astrophysics, Vol. 470, 161-171.
2. ^ Foster, T. & MacWilliams, J. (2006). "Modeling the Neutral Hydrogen
Interstellar Medium: A Better Kinematic Distance Tool", The Astrophysical
Journal, Vol. 644, 214-228. [2006ApJ...644..214F]
3. ^ Moór, A. & Kiss, Cs. (2003). "Multiwavelength Study of the Cas OB5
Supershell", Commmunications of the Konkoly Observatory Hungary, Vol. 103,