Sidus Ludoviciana
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| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 13h 24m 51.8516s[1] |
| Declination | +54° 53′ 50.839″[1] |
| Apparent magnitude (V) | +7.58[2] |
| Characteristics | |
| Spectral type | A8/F0III[3] |
| Astrometry | |
| Radial velocity (Rv) | −4.9[3] km/s |
| Proper motion (μ) | RA: −19.910[1] mas/yr Dec.: −5.202[1] mas/yr |
| Parallax (π) | 10.8536 ± 0.0280 mas[1] |
| Distance | 300.5 ± 0.8 ly (92.1 ± 0.2 pc) |
| Details | |
| Radius | 1.61[1] R☉ |
| Luminosity | 6.159[1] L☉ |
| Temperature | 7,167[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Sidus Ludoviciana /ˈsaɪdəs ˌljuːdoʊˌvɪsiˈeɪnə/[citation needed] is an 8th-magnitude star in the asterism of the Big Dipper in the constellation Ursa Major, halfway between Mizar and Alcor. It was discovered on 2 December 1722 by Johann Georg Liebknecht, who mistook it for a planet and named it after Louis V, Landgrave of Hesse-Darmstadt. A line-of-sight companion with Mizar and Alcor (with a spectral type similar to the latter), it is roughly five times more distant. It has the spectral type A8/F0 III.[3]
References
- ^ a b c d e f g h Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H.
- ^ a b c Grenier, S.; Baylac, M.-O.; Rolland, L.; Burnage, R.; Arenou, F.; Briot, D.; Delmas, F.; Duflot, M.; Genty, V.; Gómez, A. E.; Halbwachs, J.-L.; Marouard, M.; Oblak, E.; Sellier, A. (1999). "Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS" (PDF). Astronomy and Astrophysics Supplement. 137 (3): 451. Bibcode:1999A&AS..137..451G. doi:10.1051/aas:1999489.
External links
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