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NGC 753
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NGC 753
NGC 753 imaged by PanSTARRS
Observation data (J2000 epoch)
ConstellationAndromeda
Right ascension01h 57m 42.2104s[1]
Declination+35° 54′ 58.262″[1]
Redshift0.016221[1]
Heliocentric radial velocity4863 km/s[1]
Distance220 Mly (67 Mpc)[2]
Group or clusterAbell 262
Apparent magnitude (V)12.97[1]
Characteristics
TypeSAB(rs)bc[1]
Size~148,000 ly (45.39 kpc) (estimated)[1]
Apparent size (V)2.5′ × 1.9′[1]
Other designations
IRAS 01547+3540, UGC 1437, MCG +06-05-066, PGC 7387, CGCG 522-086[1]

NGC 753 is a spiral galaxy[1] located 220 million light-years away[2] in the constellation Andromeda. The galaxy was discovered by astronomer by Heinrich d'Arrest on September 16, 1865[3] and is a member of Abell 262.[4][5][6][7][8][9]

NGC 753 has roughly 2-3 times more mass than the Milky Way[4] and is classified as a radio galaxy.[10][11][12]

Physical characteristics

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NGC 753 contains two main arms that extend to 180° on either side of the galaxy.[13][14] From the two main arms, there are three larger and weaker arms that sub-divide into several branches.[13] This open structure of the arms may be due to the influence of NGC 759 which is a close companion of NGC 753[13][14] that lies 1.4 Mly (0.44 Mpc) away.[14]

Supermassive black hole

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NGC 753 has a supermassive black hole with an estimated mass of (2.2 ± 0.4) × 107 M☉.[15]

Supernovae

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NGC 753 has hosted two supernovae:[16]

  • SN 1954E (type unknown, mag. 18.5) was discovered by Fritz Zwicky on 26 September 1954.[17][18][16][19]
  • SN 2025mbr (Type Ia, mag. 17.3695) was discovered by the Automatic Learning for the Rapid Classification of Events (ALeRCE) on 25 May 2025.[20]

See also

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References

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