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NGC 521

April 09, 2024

NGC 521, also occasionally referred to as PGC 5190 or UGC 962, is a barred spiral galaxy located approximately 224 million light-years from the Solar System[4] in the constellation Cetus.[2] It was discovered on 8 October 1785 by astronomer William Herschel.[5]

NGC 521
NGC 521 as seen on an image recorded the Mount Lemmon Observatory using the 32-inch Schulman reflecting telescope in 2015
Observation data (J2000[1] epoch)
ConstellationCetus[2]
Right ascension01h 24m 33.8s[3]
Declination+01° 24′ 33.8″[3]
Redshift0.016902[1]
Heliocentric radial velocity5024.3 km/s[1]
Distance224 Mly[4]
Apparent magnitude (V)11.7[2]
Apparent magnitude (B)12.5[2]
Characteristics
TypeSBbc[2]
Apparent size (V)2.7' × 2.4'[2]
Other designations
PGC 5190, UGC 962, GC 304, MGC +00-04-118, 2MASS J01243377+0143532, h 115, IRAS 01219+0128[1][5]
NGC 521's location in the Cetus constellation

Observation history edit

Historic observation edit

Herschel described his discovery as "faint, pretty large, irregular round, brighter middle". Further observations were made by both his son, John Herschel, who simply noted "big" on his first and "very faint" on his second observation, as well as R. J. Mitchell, who noted "pretty big, spiral galaxy, disc enveloped in faint outlying neby and looks like an unresolved cluster."[6] NGC 521 was later catalogued by John Louis Emil Dreyer in the New General Catalogue, where the galaxy was described as "faint, pretty large, round, gradually brighter middle".[5]

Supernovae edit

A total of three supernovae have been assigned to NGC 521, with SN 1966G being the first to be observed in 1966,[7] followed by SN 1982O in 1982[8] and the most recent being SN 2006G in 2006.[9]

Description edit

The galaxy's large apparent size can be attributed to the fact that it is face-on. Despite its size, it only has an apparent visual magnitude of 11.7. It can be classified as spiral galaxy of type SBbc using the Hubble Sequence.[2] The object's distance of roughly 220 million light-years from the Solar System can be estimated using its redshift and Hubble's law.[4]

See also edit

References edit

  1. ^ a b c d "NGC 521". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-12-09.
  2. ^ a b c d e f g "Revised NGC Data for NGC 521". spider.seds.org. Retrieved 2017-10-05.
  3. ^ a b "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-10-05.
  4. ^ a b c 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. ^ a b c "New General Catalog Objects: NGC 500 - 549". cseligman.com. Retrieved 2017-10-16.
  6. ^ "astronomy-mall.com/Adventures.In.Deep.Space/NGC%201-7840%20complete.htm".
  7. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-01-24.
  8. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-01-24.
  9. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2018-01-24.

External links edit

 
Wikimedia Commons has media related to NGC 521.
  • NGC 521 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • SEDS


April 09, 2024
also, occasionally, referred, 5190, barred, spiral, galaxy, located, approximately, million, light, years, from, solar, system, constellation, cetus, discovered, october, 1785, astronomer, william, herschel, seen, image, recorded, mount, lemmon, observatory, u. NGC 521 also occasionally referred to as PGC 5190 or UGC 962 is a barred spiral galaxy located approximately 224 million light years from the Solar System 4 in the constellation Cetus 2 It was discovered on 8 October 1785 by astronomer William Herschel 5 NGC 521NGC 521 as seen on an image recorded the Mount Lemmon Observatory using the 32 inch Schulman reflecting telescope in 2015Observation data J2000 1 epoch ConstellationCetus 2 Right ascension01h 24m 33 8s 3 Declination 01 24 33 8 3 Redshift0 016902 1 Heliocentric radial velocity5024 3 km s 1 Distance224 Mly 4 Apparent magnitude V 11 7 2 Apparent magnitude B 12 5 2 CharacteristicsTypeSBbc 2 Apparent size V 2 7 2 4 2 Other designationsPGC 5190 UGC 962 GC 304 MGC 00 04 118 2MASS J01243377 0143532 h 115 IRAS 01219 0128 1 5 NGC 521 s location in the Cetus constellation Contents 1 Observation history 1 1 Historic observation 1 2 Supernovae 2 Description 3 See also 4 References 5 External linksObservation history editHistoric observation edit Herschel described his discovery as faint pretty large irregular round brighter middle Further observations were made by both his son John Herschel who simply noted big on his first and very faint on his second observation as well as R J Mitchell who noted pretty big spiral galaxy disc enveloped in faint outlying neby and looks like an unresolved cluster 6 NGC 521 was later catalogued by John Louis Emil Dreyer in the New General Catalogue where the galaxy was described as faint pretty large round gradually brighter middle 5 Supernovae edit A total of three supernovae have been assigned to NGC 521 with SN 1966G being the first to be observed in 1966 7 followed by SN 1982O in 1982 8 and the most recent being SN 2006G in 2006 9 Description editThe galaxy s large apparent size can be attributed to the fact that it is face on Despite its size it only has an apparent visual magnitude of 11 7 It can be classified as spiral galaxy of type SBbc using the Hubble Sequence 2 The object s distance of roughly 220 million light years from the Solar System can be estimated using its redshift and Hubble s law 4 See also editList of NGC objects 1 1000 References edit a b c d NGC 521 SIMBAD Centre de donnees astronomiques de Strasbourg Retrieved 2017 12 09 a b c d e f g Revised NGC Data for NGC 521 spider seds org Retrieved 2017 10 05 a b Your NED Search Results ned ipac caltech edu Retrieved 2017 10 05 a b c 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 Dd d divided by the distance is equal to the sum of the relative uncertainties of the velocity and v Ho a b c New General Catalog Objects NGC 500 549 cseligman com Retrieved 2017 10 16 astronomy mall com Adventures In Deep Space NGC 201 7840 20complete htm Your NED Search Results ned ipac caltech edu Retrieved 2018 01 24 Your NED Search Results ned ipac caltech edu Retrieved 2018 01 24 Your NED Search Results ned ipac caltech edu Retrieved 2018 01 24 External links edit nbsp Wikimedia Commons has media related to NGC 521 NGC 521 on WikiSky DSS2 SDSS GALEX IRAS Hydrogen a X Ray Astrophoto Sky Map Articles and images SEDS Retrieved from https en wikipedia org w index php title NGC 521 amp oldid 1182045601, wikipedia, wiki, book, books, library,

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