Astronomy:NGC 4615

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NGC 4615
NGC 4615 imaged by SDSS
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension 12h 41m 37.3313s[1]
Declination+26° 04′ 21.871″[1]
Redshift0.015797±0.0000112[1]
Helio radial velocity4,736±3 km/s[1]
Distance213 Mly (65.4 Mpc)[1]
Group or clusterHolm 439
Apparent magnitude (V)13.84[1]
Characteristics
TypeScd[1]
Size~160,400 ly (49.17 kpc) (estimated)[1]
Apparent size (V)1.6′ × 0.7′[1]
Other designations
HOLM 439A, IRAS 12391+2620, Arp 34, UGC 7852, MCG+04-30-013, PGC 42584[1]

NGC 4615 is a spiral galaxy in the constellation of Coma Berenices. Its velocity with respect to the cosmic microwave background is 5,022±20 km/s, which corresponds to a Hubble distance of 241.6 ± 16.9 Mly (74.07 ± 5.19 Mpc).[1] However, one non-redshift measurement gives a much closer distance of 213 Mly (65.4 Mpc).[2] It was discovered by German astronomer Heinrich d'Arrest on 9 May 1864.[3]

NGC 4615 and NGC 4614 imaged by SDSS

NGC 4615 is listed in Halton Arp's Atlas of Peculiar Galaxies as Arp 34, as an example of a galaxy that looks like a stretched-out S shape.[4]

NGC 4615 and NGC 4614 are listed together as Holm 439 in Erik Holmberg's A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems, published in 1937.[5] This grouping was also listed by A. P. Mahtessian in a paper published in 1998.[6]

Supernovae

Two supernovae have been observed in NGC 4615:

  • SN 1987F (Type II-P, mag. 15.8) was discovered independently by Natalya Metlova on 22 April 1987, and by Thomas Schildknecht on 23 April 1987.[7][8][9]
  • SN 2025nzi (Type Ib, mag. 19.016) was discovered by ATLAS on 18 June 2025.[10]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 4615". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+4615. 
  2. ↑ "Distance Results for NGC 4615". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+4615. 
  3. ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 4615". https://cseligman.com/text/atlas/ngc46.htm#4615. 
  4. ↑ Arp, Halton (1966). "Atlas of Peculiar Galaxies". The Astrophysical Journal Supplement Series 14: 1. doi:10.1086/190147. Bibcode: 1966ApJS...14....1A. 
  5. ↑ Holmberg, Erik (1937). "A Study of Double and Multiple Galaxies Together with Inquiries into some General Metagalactic Problems". Annals of the Observatory of Lund 6: 1. Bibcode: 1937AnLun...6....1H. 
  6. ↑ Mahtessian, A. P. (1998). "Groups of galaxies. III. Some empirical characteristics". Astrophysics 41 (3): 308. doi:10.1007/BF03036100. Bibcode: 1998Ap.....41..308M. 
  7. ↑ Wild, P.; Schildknecht, T. (1987). "Supernova 1987F in NGC 4615". International Astronomical Union Circular (4374): 1. Bibcode: 1987IAUC.4374....1W. http://www.cbat.eps.harvard.edu/iauc/04300/04374.html#Item1. 
  8. ↑ Cherepashchuk, A. M.; Metlova, N.; Wheeler, J. C.; Kirshner, R. P.; Crotts, A.; McMahan, R.; Wegner, G.; Swanson, S. (1987). "Supernova 1987F in NGC 4615?". International Astronomical Union Circular (4381): 1. Bibcode: 1987IAUC.4381....1C. http://www.cbat.eps.harvard.edu/iauc/04300/04381.html#Item1. 
  9. ↑ "SN 1987F". IAU. https://www.wis-tns.org/object/1987F. 
  10. ↑ "SN 2025nzi". IAU. https://www.wis-tns.org/object/2025nzi. 

Coordinates: Sky map 12h 41m 37.3313s, +26° 04′ 21.871″



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