Sh 2-306

Sharpless 2-306

Nebula
Observation data: J2000 epoch
Right ascension	07^h 31^m 02^s
Declination	−19° 09′ 17″[1]
Distance	4200 pc
Apparent dimensions (V)	30' x 30'[2]
Constellation	Puppis
Designations	BRAN 39, RCW 10, LBN 1050
See also: Lists of nebulae

Sh 2-306 (also designated RCW 10), is an emission nebula and H II region located in the southern constellation Puppis. It is catalogued in the Sharpless catalog and forms part of a large star-forming complex within the Perseus Arm of the Milky Way.^[3] It is located close to Sh 2-309.^[4]

Three stars are responsible for the ionization of the nebula LSS 458 (O6.5V((f))z)^[5], LSS 499 (OB)^[6] and LSS 467 (O9).^[7] These stars are embedded within a giant molecular cloud complex sometimes referred to as JKK96 D.^[8] Sh 2-306 is situated near the center of the GS234-02 supershell^[9][10], a vast infrared-emitting ring structure spanning several degrees, believed to be the result of multiple supernova explosions and stellar winds from previous generations of massive stars.^[3]

References

1. "Sh 2-306".
2. "Sharpless (Sh2) - Astrobasics". 13 September 2022.
3. "Sh 2-306".
4. "CCD Images of the Sharpless Catalog".
5. "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-17.
6. "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-17.
7. "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-17.
8. "Simbad - Object view". simbad.cds.unistra.fr. Retrieved 2025-11-17.
9. "[S87c] Loop 235-3". simbad.harvard.edu. Retrieved 2025-11-17.
10. Jung, Jae Hoon; Koo, Bon-Chul; Kang, Yong-Hee (October 1996). "GS234-02: A Star Forming Supershell in the Outer Galaxy". The Astronomical Journal. 112: 1625. Bibcode:1996AJ....112.1625J. doi:10.1086/118128. ISSN 0004-6256. Archived from the original on 2022-04-24.