NGC 2174

NGC 2174
Stellar nursery NGC 2174 by HST Credit: ESA/Hubble & NASA
Observation data: J2000 epoch
Type	Emission
Right ascension	06h 09.7m[1]
Declination	+20° 30′[1]
Distance	6,400 ly (2,000 pc)[citation needed]
Apparent magnitude (V)	6.8[citation needed]
Apparent dimensions (V)	40′[citation needed]
Constellation	Orion
Physical characteristics
See also: Diffuse nebula, Lists of nebulae
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NGC 2174 (also known as Monkey Head Nebula) is an H II^[1] emission nebula located in the constellation Orion and is associated with the open star cluster NGC 2175.^[1] It is thought to be located about 6,400 light-years away from Earth. The nebula may have formed through hierarchical collapse.^[2]

References

1. ^ ^{a b c d} "SIMBAD Astronomical Database". Results for NGC 2174. http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NGC+2174&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved 2011-07-13. 
2. ^ Cotera, A.; Hester, J.; Healy, K.; Snider, K.; Simpson, J.; Whitney, B. (2006). "Using Spitzer IRAC observations to Compare Modes of Star Formation in G305.35+0.7 and NGC 2174/5". Triggered Star Formation in a Turbulent ISM, International Astronomical Union. Symposium no. 237, held 14–18 August 2006 in Prague, Czech Republic, S237, #98. Bibcode 2006IAUS..237E..98C. ^{[dead link]}

External links

• NGC 2174: Emission Nebula in Orion, 2008/6/12 Astronomy Picture of the Day
• NGC 2174: Stars Versus Mountains, 2011/2/9 Astronomy Picture of the Day