| NGC 7840 | |
|---|---|
 SDSS image of NGC 7840 | |
| Observation data (J2000 epoch) | |
| Constellation | Pisces |
| Right ascension | 00 07 08.79 |
| Declination | +08° 22′ 59.6″ |
| Apparent magnitude (V) | 15 |
| Characteristics | |
| Type | S? |
| Apparent size (V) | 0.676′ × 0.457′ |
| Other designations | |
| 2MASX J00070878+0822598, PGC 1345780 | |
NGC 7840, the last numerical entry in the New General Catalogue, is an unbarred spiral galaxy in the constellation Pisces. 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. It was discovered by German astronomer Albert Marth on 29 November 1864.
For observing from Earth's surface, it has a magnitude of 15.5 in the early 21st century. One observing guide recommended a telescope with a least 300mm aperture for observations.
See also
References
- ^ Celestial Atlas, "NGC Object 7840", Courtney Seligman, March 2010 (accessed 2010-10-27)
- WikiSky, "NGC 7840" (accessed 2010-10-17)
- ^ "Search specification: NGC 7840". HyperLeda. Université Claude Bernard Lyon 1. Retrieved 2021-02-12.
- "NASA/IPAC Extragalactic Database". Results for NGC 7840. Retrieved 3 August 2024.
- ^ Bakich, Michael E. (2010-07-10). 1,001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers. Springer Science & Business Media. ISBN 9781441917775.
External links
Media related to NGC 7840 at Wikimedia Commons- NGC 7840 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
| New General Catalogue 7500 to 7840 | |
|---|---|
| |
 | This spiral galaxy article is a stub. You can help Misplaced Pages by expanding it. |