Astronomy:NGC 5102
| NGC 5102 | |
|---|---|
 NGC 5102 imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Centaurus |
| Right ascension | 13h 21m 57.6s[1] |
| Declination | −36° 37′ 49″[1] |
| Redshift | 468 ± 2 km/s[1] |
| Distance | 12.1 ± 0.7 Mly (3.70 ± 0.23 Mpc)[2][3][4][5] |
| Apparent magnitude (V) | 10.4[1] |
| Characteristics | |
| Type | SA0−[1] |
| Apparent size (V) | 8.7′ × 2.8′[1] |
| Other designations | |
| PGC 46674[1] | |
NGC 5102 is a lenticular galaxy in the Centaurus A/M83 Group of galaxies. It was discovered by John Herschel in 1835.
Distance measurements
At least two techniques have been used to measure the distance to NGC 5102. The surface brightness fluctuations distance measurement technique estimates distances to spiral galaxies based on the graininess of the appearance of their bulges. The distance measured to NGC 5102 using this technique is 13.0 ± 0.8 Mly (4.0 ± 0.2 Mpc).[2] However, NGC 5102 is close enough that the tip of the red giant branch (TRGB) method may be used to estimate its distance. The estimated distance to NGC 5102 using this technique is 11.1 ± 1.3 Mly (3.40 ± 0.39 Mpc).[3] Averaged together, these distance measurements give a distance estimate of 12.1 ± 0.7 Mly (3.70 ± 0.23 Mpc).[5]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 "NASA/IPAC Extragalactic Database". Results for NGC 5102. http://nedwww.ipac.caltech.edu/.
- ↑ 2.0 2.1 J. L. Tonry; A. Dressler; J. P. Blakeslee; E. A. Ajhar et al. (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal 546 (2): 681–693. doi:10.1086/318301. Bibcode: 2001ApJ...546..681T.
- ↑ 3.0 3.1 I. D. Karachentsev; V. E. Karachentseva; W. K. Hutchmeier; D. I. Makarov (2004). "A Catalog of Neighboring Galaxies". Astronomical Journal 127 (4): 2031–2068. doi:10.1086/382905. Bibcode: 2004AJ....127.2031K.
- ↑ Karachentsev, I. D.; Kashibadze, O. G. (2006). "Masses of the local group and of the M81 group estimated from distortions in the local velocity field". Astrophysics 49 (1): 3–18. doi:10.1007/s10511-006-0002-6. Bibcode: 2006Ap.....49....3K.
- ↑ 5.0 5.1 average(4.0 ± 0.2, 3.40 ± 0.39) = ((870 + 760) / 2) ± ((602 + 802)0.5 / 2) = 820 ± 50
External links
- NGC 5102 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
Coordinates: 
13h 21m 57.6s, −36° 37′ 49″
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