NGC 508

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NGC 508
NGC 0508 SDSS.jpg
SDSS view of NGC 508
Observation data (J2000 [1] epoch)
Constellation Pisces [2]
Right ascension 01h 23m 40.6s [3]
Declination +33° 16 49 [3]
Redshift 0.01835 ± 0.00007 [1]
Helio radial velocity (5451 ± 21) km/s [1]
Distance 247 Mly [4]
Apparent magnitude  (V)13.1 [2]
Apparent magnitude  (B)14.1 [2]
Characteristics
Type E [2]
Apparent size  (V)1.1' × 1.1' [2]
Other designations
PGC 5099, UGC 939, GC 295, MGC +05-04-045, 2MASS J01234058+3316502 [1] [5]

NGC 508, also occasionally referred to as PGC 5099 or UGC 939, is an elliptical galaxy in the constellation Pisces. [2] It is located approximately 247 million light-years from the Solar System [4] and was discovered on 12 September 1784 by British astronomer William Herschel. [5] [6]

Contents

Observation history

Herschel discovered NGC 508 along with NGC 507 and described the objects as "Two. Both eF, S, but unequal.". His observed position was catalogued and is accurate. [6] John Louis Emil Dreyer, creator of the New General Catalogue, described the galaxy as "very faint, small, northern of two", with the other object being NGC 507. [5]

Description

The galaxy has an apparent size of 1.1 × 1.1 arcmins and a recessional velocity of 5525 kilometers per second. It is thought to be a group member with NGC 507, but as there is no evidence of interaction between the objects, the two are not necessarily a physical pair. Although NGC 508 is usually treated as part of Arp 229, the description of the Arp-galaxy only applies to the larger NGC 507. Therefore, the term Arp 229 should only be used as an alternative designation for NGC 507. [5]

See also

Related Research Articles

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<span class="mw-page-title-main">NGC 517</span> Lenticular galaxy in the constellation Pisces

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References

  1. 1 2 3 4 "NGC 508" . Retrieved 2017-12-09.
  2. 1 2 3 4 5 6 "Revised NGC Data for NGC 508". spider.seds.org. Retrieved 2017-10-05.
  3. 1 2 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
  4. 1 2 An object's distance from Earth can be determined using Hubble's law: v=Ho is Hubble's constant (70±5 (km/s)/Mpc). The relative uncertainty Δd/d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v=Ho
  5. 1 2 3 4 "New General Catalog Objects: NGC 500 - 549". cseligman.com. Retrieved 2017-10-16.
  6. 1 2 "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm".