HH 1/2

< HH 1
HH 1/2
Emission nebula
Herbig–Haro object
Hubble Space Telescope WFC3 image of HH 1/2 and the jet pointing to HH 1 (right)
Observation data: J2000.0 epoch
Right ascension05h 36m 22.8s
Declination−06° 46′ 03″
Distance1500 ly
ConstellationOrion
DesignationsHH 1-2, HH 1/2, HH 1, HH 2

The Herbig-Haro objects HH 1/2 are the first such objects to be recognized as Herbig-Haro objects and were discovered by George Herbig and Guillermo Haro. They are located at a distance of about 1343 light-years (412 parsec) in the constellation Orion near NGC 1999. HH 1/2 are among the brightest Herbig-Haro objects in the sky and consist of a pair of oppositely oriented bow shocks, separated by 2.5 arcminutes (a projected separation of about 1.1 light year). The HH 1/2 pair were the first Herbig-Haro objects with detected proper motion and HH 2 was the first Herbig-Haro object to be detected in x-rays. Some of the structures in the Herbig-Haro Objects move with a speed of 400 km/s.

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