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NGC 1003

Galaxy in the constellation Perseus

NGC 1003
NGC 1003 from the Hubble Space Telescope
Observation data (J2000[1] epoch)
Constellation	Perseus
Right ascension	02h39m 16.893s[2]
Declination	+40° 52′ 20.25″[2]
Redshift	0.002090[3]
Heliocentric radial velocity	624 km/s[4]
Distance	35.9 kly (11.02 kpc)[4]
Grouporcluster	NGC 1023 group[5]
Apparent magnitude (B)	12.1[3]
Characteristics
Type	SAcd[6]
Mass	299+28 −26×1010[7] M☉
Mass/Light ratio	0.70+0.16 −0.15[7] M☉/L☉
Notable features	Warped disk[6]
Other designations
NGC 1003, UGC 2137, MCG +07-06-051, PGC 10052[3]

NGC 1003 is a spiral galaxy at the western edge of the Perseus constellation.^[8] It is located at a distance of about 36 million light years from the Milky Way and is receding with a heliocentric radial velocityof624 km/s.^[4] This galaxy was discovered by the Anglo-German astronomer William Herschel on October 6, 1784, who described it as "pretty faint, large, extended 90°±, much brighter middle, mottled but not resolved".^[9] It is a member of the NGC 1023 group of galaxies.^[5]

The morphological class of NGC 1003 is SAcd, which means it is an unbarred spiral galaxy (SA) with somewhat loosely-wound spiral arms (cd). It is inclined by an angle of 70° to the line of sight from the Earth, with the major axis aligned along a position angle of 276°. The visual disk of the galaxy shows a substantial warping in the eastern side, turning it almost face on. The estimated star formation rate is 0.40 M_☉·yr⁻¹.^[6] It has a virial massof3×10¹² M_☉ and a mass-to-light ratio of 0.7.^[7]

Atype Ia supernova^[10] was discovered in the galaxy by F. Zwicky in 1937,^[11] and subsequently designated SN 1937D.

• 
  NGC 1003 taken from the Nicholas U. Mayall TelescopeatKitt Peak National Observatory.^[12]

• "Revised NGC Data for NGC 1003". spider.seds.org. Retrieved 2017-09-17.
• "Your NED Search Results". nedwww.ipac.caltech.edu. Retrieved 2017-09-17.
• Media related to NGC 1003 at Wikimedia Commons