NGC 501

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NGC 501
NGC 0501 SDSS.jpg
SDSS view of NGC 501
Observation data (J2000 [1] epoch)
Constellation Pisces [2]
Right ascension 01h 23m 22.4s [3]
Declination +33° 25 59 [3]
Redshift 0.016561 ± 0.000227 [1]
Helio radial velocity (4924 ± 68) km/s [1]
Distance 224 Mly [4]
Apparent magnitude  (V)14.5 [2]
Apparent magnitude  (B)15.5 [2]
Characteristics
Type E0 [2]
Apparent size  (V)0.5' × 0.5' [2]
Other designations
PGC 5082, GC 284, 2MASS J01232240+3325582 [1] [5]

NGC 501, also occasionally referred to as PGC 5082 or GC 284, is an elliptical galaxy in the constellation Pisces. [2] It is located approximately 224 million light-years from the Solar System [4] and was discovered on 28 October 1856 by Irish astronomer R. J. Mitchell. [5]

Contents

Observation history

Although John Dreyer, creator of the New General Catalogue, credits the discovery to astronomer William Parsons, 3rd Earl of Rosse, he notes that many of his claimed discoveries were made by one of his assistants. In the case of NGC 501, the discovery was made by R. J. Mitchell, [5] who discovered it using Lord Rosse's 72" reflecting telescope at Birr Castle in County Offaly, Ireland. [6] The object was described "very faint, small (E in Birr diagram)" in the New General Catalogue. [5]

See also

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<span class="mw-page-title-main">NGC 502</span> Lenticular galaxy in the constellation Pisces

NGC 502, also occasionally referred to as PGC 5034 or UGC 922, is a lenticular galaxy in the constellation Pisces. It is located approximately 113 million light-years from the Solar System and was discovered on 25 September 1862 by German astronomer Heinrich Louis d'Arrest. When the Morphological Catalogue of Galaxies was published between 1962 and 1974, the identifications of NGC 502 and NGC 505 were reversed. In reality, NGC 502 is equal to MGC +01-04-041 and not MCG +01-04-043 as noted in the catalogue.

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NGC 503, also occasionally referred to as PGC 5086 or GC 5169, is an elliptical galaxy in the constellation Pisces. It is located approximately 265 million light-years from the Solar System and was discovered on 13 August 1863 by German astronomer Heinrich Louis d'Arrest.

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

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<span class="mw-page-title-main">NGC 521</span> Spiral galaxy in the constellation Cetus

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<span class="mw-page-title-main">NGC 522</span> Spiral galaxy in the constellation Pisces

NGC 522, also occasionally referred to as PGC 5218 or UGC 970, is a spiral galaxy located approximately 122 million light-years from the Solar System in the constellation Pisces. It was discovered on 25 September 1862 by astronomer Heinrich Louis d'Arrest.

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References

  1. 1 2 3 4 "NGC 501" . Retrieved 2017-12-09.
  2. 1 2 3 4 5 6 "Revised NGC Data for NGC 501". 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. "Photos". www.klima-luft.de. Retrieved 2017-12-09.