NGC 5273

NGC 5273
Sloan Digital Sky Survey image of NGC 5273
Observation data (J2000 epoch)
Right ascension13h 42m 08.380s[1]
Declination+35° 39′ 15.47″[1]
Redshift0.00362[2]
Distance54.1 ± 6.8 Mly (16.6 ± 2.1 Mpc)[3][4]
Apparent magnitude (V)11.6[5]
13.12[6]
Apparent magnitude (B)14.01[6]
Characteristics
TypeSA0(s)[4]
Apparent size (V)2.8′ × 2.4′[5]
Other designations
NGC 5273, UGC 8675, PGC 48521[7]
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NGC 5273 is a lenticular galaxy located 54 million light-years[4] away in the northern constellation of Canes Venatici. This galaxy was discovered by William Herschel on May 1, 1785.[8] It is positioned 1+1⁄4° to the southeast of the star 25 Canum Venaticorum.[5]

The morphological classification of this galaxy is SA0(s),[4] indicating it is lenticular in form. It displays a faint, unbarred spiral structure within a generally elliptical profile.[9] NGC 5273 is classified as a type 1.5 Seyfert galaxy, with the X-ray emission from its active galactic nucleus undergoing significant absorption.[10] However, data collected between the year 2000 and 2022 suggest this is a changing–look Seyfert, with the type ranging from 1 to 1.8/1.9.[11] The activity level shows strong variability, allowing reverberation mapping of the supermassive black hole at the core. This object has an estimated mass of (4.7±1.6)×106 M☉.[9]

  1. ^ a b Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Pahari_et_al_2017 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Tully_et_al_2016 was invoked but never defined (see the help page).
  4. ^ a b c d Cite error: The named reference Merrell_et_al_2023 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference O'Meara_2007 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Véron-Cetty_Véron_2010 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Seligman was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference Bentz_et_al_2014 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Trippe_et_al_2010 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Neustadt_et_al_2023 was invoked but never defined (see the help page).