IC 4997
Planetary Nebula IC 4997 |
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Photo from the Hubble Space Telescope | |
AladinLite | |
Constellation | arrow |
Position equinox : J2000.0 |
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Right ascension | 20h 20m 08.8s |
declination | + 16 ° 43 ′ 54 ″ |
Appearance | |
Apparent brightness (visual) | 10.5 mag |
Apparent brightness (B-band) | 11.6 mag |
Angular expansion | 0.22 |
Central star | |
designation | HD 193538 |
Apparent brightness | 11 likes |
Physical data | |
Radial velocity | −66.2 km / s |
distance | 8,000 ly |
history | |
discovery | Williamina Fleming |
Date of discovery | 1896 |
Catalog names | |
IC 4997 • PK 058-10.1 • PN G058.3-10.9 • Hen 2-464 |
IC 4997 is a planetary nebula in the constellation Arrow , which was discovered by the astronomer Williamina Fleming in 1896.