IC 4997

IC 4997
Emission nebula
Planetary nebula
Observation data: J2000 epoch
Right ascension20h 20m 08.76s[1]
Declination+16° 43′ 53.7″[1]
Distance14,090 (4,320 pc)[2] ly
Apparent magnitude (V)11.15[1]
Apparent dimensions (V)2.7″ x 1.4″ [3]
ConstellationDelphinus[4]
Physical characteristics
Radius0.092 ly
Notable featuresBipolar outflow, Bipolar nebula
DesignationsIC 4997

PNG 058.3-10.9
PK 058-10 1
Hen 2-464
PN ARO 38

V* QV Sge
See also: Lists of nebulae

IC 4997 is a planetary nebula located in the constellation of Delphinus.[4] It was discovered in 1896 by Edward Charles Pickering and Williamina Fleming,[5] and independently by Gustav Gruss the same year.[6] This nebula is about 14,000 light-years from Earth.[2] It looks like an ordinary star in smaller telescopes, and only detailed study of its spectrum reveals its nebular characteristics.[7]

  1. ^ a b c Cite error: The named reference simbad was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference BailerJones2022 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Miranda1996 was invoked but never defined (see the help page).
  4. ^ a b "The Sky Live". The Sky Live. Retrieved 2023-11-18.
  5. ^ Cite error: The named reference Pickering1896 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference cseligman was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference illinois was invoked but never defined (see the help page).