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]

File:NGC 4613 14 15 SDSS.jpg
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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