NGC 7538

NGC 7538
Observation data: J2000.0 epoch
Type	Emission or Reflection
Right ascension	23h 13m 45.7s[1]
Declination	+61° 28′ 21″[1]
Distance	9,100 ly (2,800 pc)[2]
Apparent dimensions (V)	9′.00 × 6′.0
Constellation	Cepheus
Physical characteristics
Absolute magnitude (V)	—
Notable features	Contains largest known protostar
Other designations	Bubble Nebula, Dreyer's Object, Sharpless 158
See also: Diffuse nebula, Lists of nebulae
v · d · e

NGC 7538, near the more famous Bubble Nebula, is located in the constellation Cepheus. It is located about 9,100 light years away from earth. It is home to the biggest yet discovered protostar which is about 300 times the size of our Solar System. It is located in the Perseus Spiral Arm of the Milky Way and is probably part of the Cassiopeia OB2 complex.^[2] It is a region of active star formation including several luminous near-IR and far-IR sources.^[2]

References

1. ^ ^{a b} "SIMBAD Astronomical Database". Results for NGC 7538. http://simbad.u-strasbg.fr/Simbad. Retrieved 2006-10-20. 
2. ^ ^{a b c} Balog, Z.; Kenyon, S. J.; Lada, E. A.; Barsony, M.; Vinkó, J.; Gáspar', A. (2004). "A Near-Infrared (JHK) Survey of the Vicinity of the H II Region NGC 7538: Evidence for a Young Embedded Cluster". The Astronomical Journal 128 (6): Issue 6, pp. 2942–2953.. arXiv:astro-ph/0409115. Bibcode 2004AJ....128.2942B. doi:10.1086/425548.