Astronomy:NGC 3745

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NGC 3745
DECam image of NGC 3745 and the members of the Copeland Septet
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 37m 44.434s
Declination+22d 01m 16.64s
Redshift0.031577
Helio radial velocity9,467 km/s
Distance471 Mly (144.4 Mpc)
Group or clusterCopeland Septet
Apparent magnitude (V)15.2
Characteristics
TypeSB(s)0, E-S0
Size74,500 ly
Other designations
PGC 36001, MCG +04-28-004, Copeland Septet NED01, 2MASX J11374443+2201170, SDSS J113744.43+220116.5, HCG 057G, NSA 112840, SSTSL2 J113744.44+220116.6, LEDA 36001

NGC 3745 is a lenticular galaxy with a bar structure[1] located in the constellation of Leo.[2][3] NGC 3745 is located 471 million light-years away from the Solar System[4] and was discovered by Ralph Copeland on April 5, 1874, but also observed by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer.[5]

Copeland Septet

NGC 3745 is a member of the Copeland Septet.[6] The other members of the group are NGC 3746, NGC 3748, NGC 3750, NGC 3751, NGC 3753 and NGC 3754.[7]

Sloan Digital Sky Survey image of NGC 3745 which is located above NGC 3746.

Halton Arp noticed the group when he published the article in 1966.[8] The group is designated as Arp 320 in which another galaxy PGC 36010, is part of it.[9]

This group was also observed by Paul Hickson, in which he included them inside his article in 1982.[10] This group is known as Hickson 57, in which NGC 3745 is designated as HCG 57G.[11]

References

  1. ↑ "HyperLeda -object description". http://atlas.obs-hp.fr/hyperleda/ledacat.cgi?o=NGC%203745. 
  2. ↑ "Revised NGC Data for NGC 3745". https://spider.seds.org/ngc/revngcic.cgi?NGC3745. 
  3. ↑ Astronomy, Go. "NGC 3745 | galaxy in Leo | NGC List | GO ASTRONOMY" (in en-US). https://www.go-astronomy.com/ngc.php?ID=3973. 
  4. ↑ "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=56894&objname=1&img_stamp=YES&hconst=73.0&omegam=0.27&omegav=0.73&corr_z=1. 
  5. ↑ "New General Catalog Objects: NGC 3700 - 3749". https://cseligman.com/text/atlas/ngc37.htm#3745. 
  6. ↑ Bakich, Michael E. (2024-01-01). "Copeland's Septet" (in en-US). https://www.astronomy.com/science/copelands-septet/. 
  7. ↑ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". https://www.constellation-guide.com/copelands-septet/. 
  8. ↑ "NED Search Results for ARP 320". https://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=Arp+320&extend=yes&out_csys=Equatorial&out_equinox=B1950.0&obj_sort=RA+or+Longitude&zv=z&zv_breaker=10000.0. 
  9. ↑ "Copeland's Septet (Arp 320) - Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes". https://cs.astronomy.com/asy/m/galaxies/492462.aspx. 
  10. ↑ Hickson, P. (1982-04-01). "Systematic properties of compact groups of galaxies.". The Astrophysical Journal 255: 382–391. doi:10.1086/159838. ISSN 0004-637X. Bibcode: 1982ApJ...255..382H. https://ui.adsabs.harvard.edu/abs/1982ApJ...255..382H. 
  11. ↑ "Data from Revised NGC and IC catalogue by Wolfgang Steinickle - NGC 3700 to 3799". http://astrovalleyfield.ca/AstronomieCompl/NGC%20et%20autres/WolfgangS/N3700_exc_web.htm. 



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