Astronomy:NGC 3197
From HandWiki
| NGC 3197 | |
|---|---|
 NGC 3197 (left) with PGC 213677 (right) imaged by Legacy Surveys | |
| Observation data (J2000 epoch) | |
| Constellation | Draco |
| Right ascension | 10h 14m 27.7181s[1] |
| Declination | +77° 49′ 13.427″[1] |
| Redshift | 0.027069±0.0000120[1] |
| Helio radial velocity | 8,115±4 km/s[1] |
| Distance | 348.99 ± 4.98 Mly (107.000 ± 1.528 Mpc)[1] |
| Apparent magnitude (V) | 14.34[1] |
| Characteristics | |
| Type | Sbc[1] |
| Size | ~181,900 ly (55.77 kpc) (estimated)[1] |
| Apparent size (V) | 1.3′ × 1.0′[1] |
| Other designations | |
| UGC 5500, MCG+13-08-009, PGC 29870[1] | |
NGC 3197 is a spiral galaxy in the constellation of Draco. Its velocity with respect to the cosmic microwave background is 8,146±4 km/s, which corresponds to a Hubble distance of 391.9 ± 27.4 Mly (120.15 ± 8.41 Mpc).[1] However, three non-redshift measurements give a closer mean distance of 348.99 ± 4.98 Mly (107.000 ± 1.528 Mpc).[2] It was discovered by German-British astronomer William Herschel on 2 April 1801.[3][4]
Supernovae
Two supernovae have been observed in NGC 3197:
- SN 2005kx (Type II, mag. 17.3) was discovered by Tim Puckett and J. Tigner on 26 November 2005.[5][6]
- SN 2022xqp (Type Ia, mag. 19.7221) was discovered by the Zwicky Transient Facility on 14 October 2022.[7]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 "Results for object NGC 3197". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+3197.
- ↑ "Distance Results for NGC 3197". NASA. https://ned.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+3197.
- ↑ Herschel, William (1802). "Catalogue of 500 New Nebulae, Nebulous Stars, Planetary Nebulae, and Clusters of Stars; with Remarks on the Construction of the Heavens". Philosophical Transactions of the Royal Society of London 92: 477–528. doi:10.1098/rstl.1802.0021. Bibcode: 1802RSPT...92..477H.
- ↑ Seligman, Courtney. "New General Catalogue Objects: NGC 3197". https://cseligman.com/text/atlas/ngc31a.htm#3197.
- ↑ Puckett, T.; Tigner, J. (2005). "Supernovae 2005kv-2005kx". International Astronomical Union Circular (8635): 3. Bibcode: 2005IAUC.8635....3P. http://www.cbat.eps.harvard.edu/iauc/08600/08635.html#Item2.
- ↑ "SN 2005kx". IAU. https://www.wis-tns.org/object/2005kx.
- ↑ "SN 2022xqp". IAU. https://www.wis-tns.org/object/2022xqp.
External links
- NGC 3197 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
10h 14m 27.7181s, +77° 49′ 13.427″
 |  |
