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NGC 7840
Galaxy in the constellation Pisces / From Wikipedia, the free encyclopedia
NGC 7840, the last numerical entry in the New General Catalogue, is an unbarred spiral galaxy in the constellation Pisces.[1] Its velocity with respect to the cosmic microwave background is 10906 ± 49 km/s, which corresponds to a Hubble distance of 160.85 ± 11.30 Mpc (∼524 million light-years), and its diameter is about 162,000 light-years.[4] It was discovered by German astronomer Albert Marth on 29 November 1864.[1]
Quick Facts Observation data (J2000 epoch), Constellation ...
NGC 7840 | |
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![]() SDSS image of NGC 7840 | |
Observation data (J2000 epoch) | |
Constellation | Pisces[1][2] |
Right ascension | 00h 07m 08.79s[3] |
Declination | +08° 22′ 59.6″[3] |
Apparent magnitude (V) | 15[1] |
Characteristics | |
Type | S?[1] |
Apparent size (V) | 0.676′ × 0.457′ |
Other designations | |
2MASX J00070878+0822598, PGC 1345780[3] |
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For observing from Earth's surface, it has a magnitude of 15.5 in the early 21st century.[5] One observing guide recommended a telescope with a least 300mm aperture for observations.[5]