Messier 81
| |
| A Hubble Space Telescope (HST) image of Messier 81 | |
| Data pengamatan Epos J2000 | |
|---|---|
| Rasi bintang | Ursa Major[3] |
| Asensio rekta | 09j 55m 33.2d[4] |
| Deklinasi | +69° 3′ 55″[4] |
| Diameter sudut (V) | 26.9 × 14.1 moa[4] |
| Magnitudo semu (V) | 6.94[5][6] |
| Ciri-ciri | |
| Jenis | SA(s)ab,[4] LINER[4] |
| Astrometri | |
| Kecepatan radial heliosentrik | −34 ± 4[4]km/s |
| Pergeseran merah | −0.000113 ± 0.000013[4] |
| Kecepatan galaktosentrik | 73 ± 6[4] km/s |
| Jarak | 118 ± 04 Mly (36,18 ± 1,23 Mpc) |
| Sebutan lainnya | |
Messier 81 atau M81 dikenal juga dengan NGC 3031 merupakan galaksi spiral yang berjarak sekitar 12 milyar tahun cahaya dari bumi, yang berada pada rasi bintang Ursa Mayor.
Referensi
- ^
Jensen, Joseph B.; Tonry, John L.; Barris, Brian J.; Thompson, Rodger I.; Liu, Michael C.; Rieke, Marcia J.; Ajhar, Edward A.; Blakeslee, John P. (2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. 583 (2): 712–726. arXiv:astro-ph/0210129
. Bibcode:2003ApJ...583..712J. doi:10.1086/345430.
- ^ 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. Bibcode:2006Ap.....49....3K. doi:10.1007/s10511-006-0002-6.
- ^ Dreyer, J. L. E. (1988). Sinnott, R. W., ed. The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters. Sky Publishing Corporation / Cambridge University Press. ISBN 0-933346-51-4.
- ^ a b c d e f g h i j k "NASA/IPAC Extragalactic Database". Results for NGC 3031. Diakses tanggal 2006-11-10.
- ^ "SIMBAD-M81". SIMBAD Astronomical Database. Diakses tanggal 2009-11-28.
- ^
Armando, Gil de Paz; Boissier, Samuel; Madore, Barry F.; Seibert, Mark; Joe, Young H.; Boselli, Alessandro; Wyder, Ted K.; Thilker, David; Bianchi, Luciana; Rey, Soo-Chang; Rich, R. Michael; Barlow, Tom A.; Conrow, Tim; Forster, Karl; Friedman, Peter G.; Martin, D. Christopher; Morrissey, Patrick; Neff, Susan G.; Schiminovich, David; Small, Todd; Donas, José; Heckman, Timothy M.; Lee, Young-Wook; Milliard, Bruno; Szalay, Alex S.; Yi, Sukyoung (2007). "The GALEX Ultraviolet Atlas of Nearby Galaxies". Astrophysical Journal. 173 (2): 185–255. arXiv:astro-ph/0606440 . Bibcode:2007ApJS..173..185G. doi:10.1086/516636.
- ^ "SIMBAD Astronomical Database". Results for NGC 3031. Diakses tanggal 2006-11-10.
