Astronomy:NGC 3748

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NGC 3748
NGC 3748 is located on the top right of the image above NGC 3745 and NGC 3746 which was taken by Mount Lemmon Observatory
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 37m 49.065s
Declination+22d 01m 34.14s
Redshift0.029407
Helio radial velocity8,816 km/s
Distance440 Mly (135 Mpc)
Group or clusterCopeland Septet
Apparent magnitude (V)14.8
Characteristics
TypeSB0?, S0, RET
Size148,000 ly
Other designations
PGC 36007, CGCG 127-007, MCG +04-28-007, Copeland Septet NED03, 2MASX J11374903+2201340, NSA 139941, HCG 057E, SDSS J113749.06+2201134.1, WBL 343-002, UZC J113749.1+220134, SSTSL2 J113749.06+220134.2, 2XMM J113749.0+220133, LEDA 36007

NGC 3748 is a lenticular galaxy with a bar[1] located in the Leo constellation.[2][3] It is located 440 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]

Sloan Digital Sky Survey image of NGC 3748 next to two members of the Copeland Septet.

Like NGC 3746, NGC 3748 also has a recessed core (RET).[4] It is described as, "moderately bright, fairly small, slightly elongated NW-SE, 0.4'x0.3' with a small bright core".[6]

Copeland Septet

NGC 3748 is a member of the Copeland Septet which is made up of 7 galaxies which were discovered by Copeland in 1874.[7] The other members are NGC 3745, NGC 3746, NGC 3750, NGC 3751, NGC 3753 and NGC 3754.[8]

Halton Arp noticed the galaxies in this group in an article that was published in 1966.[9] This group is known as Arp 320 along with another galaxy, PGC 36010.[10]

This group was observed by Paul Hickson whom he included in his article in 1982.[11] The group is known as Hickson 57, in which NGC 3748 is designated as HCG 57E.[12]

References

  1. ↑ "HyperLeda -object description". http://atlas.obs-hp.fr/hyperleda/ledacat.cgi?o=NGC%203748. 
  2. ↑ "NGC 3748 - Lenticular Galaxy in Leo | TheSkyLive.com". https://theskylive.com/sky/deepsky/ngc3748-object. 
  3. ↑ Guide, Universe (2022-02-07). "NGC 3748 Galaxy Facts" (in en-us). https://www.universeguide.com/galaxy/ngc3748. 
  4. ↑ 4.0 4.1 "Your NED Search Results". https://ned.ipac.caltech.edu/cgi-bin/objsearch?search_type=Obj_id&objid=56896&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#3748. 
  6. ↑ "NGC/IC Project Restoration Efforts". http://ngcicproject.observers.org/NGC/NGC_37xx/NGC_3748.htm. 
  7. ↑ Bakich, Michael E. (2024-01-01). "Copeland's Septet" (in en-US). https://www.astronomy.com/science/copelands-septet/. 
  8. ↑ "Copeland's Septet (Hickson Compact Group 57) – Constellation Guide". https://www.constellation-guide.com/copelands-septet/. 
  9. ↑ "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. 
  10. ↑ "Copeland's Septet (Arp 320) - Astronomy Magazine - Interactive Star Charts, Planets, Meteors, Comets, Telescopes". https://cs.astronomy.com/asy/m/galaxies/492462.aspx. 
  11. ↑ 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. 
  12. ↑ "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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