NGC 5523

NGC 5523 is an unbarred spiral galaxy in the constellation of Boötes, registered in New General Catalogue (NGC).[1] The galaxy forms an equilateral triangle with NGC 5641 and NGC 5466 when observed using a telescope from the ground.[4]

NGC 5523
SDSS image of NGC 5523
Observation data (J2000 epoch)
ConstellationBoötes
Right ascension14h 14m 52.31s[1]
Declination+25° 19′ 3.41″[1]
Redshift0.003488[1]
Heliocentric radial velocity1044 km/s[1]
Galactocentric velocity1093 km/s[2]
Distance49 ± 3 Mly
(15.0 ± 1.0 Mpc)[2]
Apparent magnitude (V)12.75[2]
Absolute magnitude (V)-18.1[nb 1]
Characteristics
TypeSA(s)cd[3]
Apparent size (V)4.6' x 1.3'[2]
Other designations
UGC 9119, MCG +04-34-008, PGC 50895[1]

Observation history

NGC 5523 was discovered by William Herschel on 19 May 1784 using 18.7-inch f/13 speculum telescope.[5][6] John Louis Emil Dreyer inside the New General Catalogue, described it as "faint, pretty large, pretty much extended 90°, 10th magnitude star to northwest".[5] It was described in Burnham's Celestial Handbook as "faint, pretty large (5.0'x0.8'), much elongated, nearly edge-on". Steve Coe, an American astronomer, described it as "faint, pretty large, much elongated (3 X 1) in PA 90 and brighter in the middle at 100X."[6]

General

The galaxy was originally thought to be isolated due to its lack of interaction with other galaxies in the past 1 to 3 billion years. However, a 2016 study reported that some irregularities of the contour of the discs and nucleated bulge at the center of the galaxy suggested that the galaxy previously had soft collisions with other galaxies.[3]

Notes
  1. Calculated from Galactocentric GSR Distance modulus[2]

References
  1. "NGC 5523". SIMBAD. Archived from the original on 22 July 2020. Retrieved 14 August 2022.
  2. "Results for object NGC 5523". NASA/IPAC Extragalactic Database. Archived from the original on 15 August 2022. Retrieved 15 August 2022.
  3. Fulmer, Leah M; Gallagher III, John S.; Kotulla, Ralf (2017). "NGC 5523: An isolated product of soft galaxy mergers?". Astronomy & Astrophysics. 598: A119. arXiv:1611.05968. Bibcode:2017A&A...598A.119F. doi:10.1051/0004-6361/201628070. S2CID 119217039.
  4. Gilmour, Jess K. (2003). "Bootes". The Practical Astronomer's Deep-sky Companion. London: Springer London. pp. 16–18. doi:10.1007/978-1-4471-0071-3_6. ISBN 978-1-85233-474-1.
  5. Seligman, Courtney. "NGC 5523 (= PGC 50895)". Seligman website. Retrieved 14 August 2022.
  6. "NGC 5523". Deep Sky Observer's Companion – the online database. Archived from the original on 3 September 2017. Retrieved 14 August 2022.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.