A Hubble Space Telescope (HST), and Subaru image of NGC 2403. NGC 2404 is visible
Observation data (J2000 epoch)
Constellation
Camelopardalis
Right ascension
07h 36m 51.4s[1]
Declination
+65° 36′ 09″[1]
Redshift
131 ± 3 km/s[1]
Distance
9.65 Mly (2.96 Mpc)[2]
Apparent magnitude (V)
8.9[1]
Characteristics
Type
SAB(s)cd[1]
Apparent size (V)
21.9′ × 12.3′[1]
Other designations
UGC 3918,[1] PGC 21396,[1] Caldwell 7
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NGC 2403 (also known as Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 Group,[3] and is approximately 8 million light-years distant. It bears a similarity to M33, being about 50,000 light years in diameter and containing numerous star-forming H II regions.[4]
The northern spiral arm connects it to the star forming region NGC 2404.[3] NGC 2403 can be observed using 10×50 binoculars.[3] NGC 2404 is 940 light-years in diameter, making it one of the largest known H II regions. This H II region represents striking similarity with NGC 604 in M33, both in size and location in galaxy.
^ abcdefgh"NASA/IPAC Extragalactic Database". Results for NGC 2403. Retrieved 2006-11-21.
^Carlin, Jeffrey L.; Garling, Christopher T.; Peter, Annika H. G.; Crnojević, Denija; Forbes, Duncan A.; Hargis, Jonathan R.; Mutlu-Pakdil, Burçin; Pucha, Ragadeepika; Romanowsky, Aaron J.; Sand, David J.; Spekkens, Kristine; Strader, Jay; Willman, Beth (2019). "Tidal Destruction in a Low-mass Galaxy Environment: The Discovery of Tidal Tails around DDO 44". The Astrophysical Journal. 886 (2): 109. arXiv:1906.08260. Bibcode:2019ApJ...886..109C. doi:10.3847/1538-4357/ab4c32. S2CID 195218404.
^ abcKepple, George Robert; Glen W. Sanner (1998). The Night Sky Observer's Guide. Vol. 1. Willmann-Bell, Inc. p. 73. ISBN 978-0-943396-58-3.
^Ho, Luis C.; Filippenko, Alexei V.; Sargent, Wallace L. W. (October 1997). "A Search for "Dwarf" Seyfert Nuclei. III. Spectroscopic Parameters and Properties of the Host Galaxies". Astrophysical Journal Supplement. 112 (2): 315–390. arXiv:astro-ph/9704107. Bibcode:1997ApJS..112..315H. doi:10.1086/313041. S2CID 17086638.
NGC2403 (also known as Caldwell 7) is an intermediate spiral galaxy in the constellation Camelopardalis. It is an outlying member of the M81 Group, and...
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include SN 2023ixf in Messier 101 (May 2023), SN 2023idj in NGC 4568 (May 2023) and SN 2023gfo in NGC 4995 (April 2023). In most entries, the year when the...
Kris; Grammer, Skyler H. (January 2019). "Luminous and Variable Stars in NGC2403 and M81". The Astronomical Journal. 157 (1): 22. arXiv:1811.06559. Bibcode:2019AJ...
Kris; Grammer, Skyler H. (January 2019). "Luminous and Variable Stars in NGC2403 and M81". The Astronomical Journal. 157 (1): 22. arXiv:1811.06559. Bibcode:2019AJ...
plane. Accordingly, many distant galaxies are visible within its borders. NGC2403 is a galaxy in the M81 group of galaxies, located approximately 12 million...
H II region: NGC 604". HST Proposal ID #10419: 10419. Bibcode:2004hst..prop10419B. "NASA/IPAC Extragalactic Database". Results for NGC 604. Archived...
NGC 2404 is a massive H II region inside NGC2403, a spiral galaxy in Camelopardalis. It was discovered on February 2, 1886 by Gulliaume Bigourdan. NGC...
galaxy in the M81 Group, believed to be a satellite galaxy of the nearby NGC2403. DDO 44 is a relatively large dwarf galaxy, and it has been observed to...
USS Cincinnati (C-7), a United States Navy protected cruiser Caldwell 7 (NGC2403), a spiral galaxy in Camelopardalis Nokia C7-00, a touch screen mobile...
"et al."(2006) The Araucaria Project: Distance to the Local Group Galaxy NGC 3109 from Near-Infrared Photometry of Cepheids see [3] Archived 2020-02-01...
objects, such as the Hyades, the Double Cluster (NGC 869 and NGC 884), and the Sculptor Galaxy (NGC 253). The Messier catalogue was actually compiled...
of Stars (abbreviated NGC) is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects...
which have shown evidence of extraplanar gas include NGC 891, NGC2403, UGC 7321, NGC 4559 and NGC 3198. Possible explanations for the presence of this...
relationship. Visual and infrared image of NGC 7793 NGC 300 - a similar spiral galaxy that is near NGC 7793 NGC2403 - a similar spiral galaxy Brown, A. G...
II Program. The catalogue contains 400 objects. All objects are from the NGC. All objects are visible in mid northern latitudes, since they were all observed...
Tammann, G. A. (1976). "Steps toward the Hubble constant. VII - Distances to NGC2403, M101, and the Virgo cluster using 21 centimeter line widths compared with...
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an "SAB(s)c" NGC2403 SABcd NGC2403 is an "SAB(s)cd" SABd SABdm SABdm can also be considered a type of intermediate Magellanic spiral NGC 4625 SABm SABm...
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