NGC 3898

NGC 3898
Hubble Space Telescope image of NGC 3898
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension11h 49m 15.370s[1]
Declination+56° 05′ 03.66″[1]
Redshift0.003894[2]
Heliocentric radial velocity1,142.7±13.9 km/s[3]
Distance72.0 ± 5.8 Mly (22.08 ± 1.79 Mpc)[4]
Apparent magnitude (V)10.7[5]
Apparent magnitude (B)11.02[6]
Characteristics
TypeSA(s)ab[7]
Apparent size (V)3.3′ × 1.5′[5]
Other designations
IRAS 11465+5621, NGC 3898, UGC 6787, LEDA 36921, MCG +09-19-204[8]

NGC 3898 is a spiral galaxy in the constellation Ursa Major that was discovered by William Herschel on April 14, 1789.[9] It is positioned 1.5° northwest of NGC 3998 and is barely visible in a small telescope. The galaxy has an apparent visual magnitude of 10.7 and an angular size of 3.3′ × 1.5′.[5] It is located at a distance of 72 ± 6 million light-years (22.08 ± 1.79 Mpc)[4] from the Milky Way, and is receding with a heliocentric radial velocity of 1,142.7±13.9 km/s.[3]

The morphological classification of NGC 3898 in the De Vaucouleurs system is SA(s)ab,[6] which indicates this is a spiral galaxy with no central bar (SA) or inner ring system (s) and tightly wound spiral arms (ab). It is gas rich and serves as the prototype of an Sa galaxy with flocculent arms.[10] The galactic plane is inclined at an angle of 68°±4° to the plane of the sky,[4] with the major axis oriented along a position angle of 107°. The nucleus is intermediate between an H II region and a LINER.[11]

There is a small, irregular galaxy, UGC 6816, located at an angular separation of 26′ from NGC 3898.[10]

  1. ^ a b Cite error: The named reference Skrutskie_et_al_2006 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Wang_et_al_2018 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference van_den_Bosch_2015 was invoked but never defined (see the help page).
  4. ^ a b c Cite error: The named reference Kourkchi_et_al_2020 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 Barbon_et_al_1978 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference ned was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference CSeligman was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference van_Driel_van_Woerden_1994 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Pignatelli_et_al_2001 was invoked but never defined (see the help page).