සිරියස් යනු රාත්රි අහසේ දිස්වන −1.46 ක දෘෂ්ටිමය දාශ්ය විශාලත්වයක් සහිතවූ එය, ඊලඟ දීප්තිමත් තාරකාව වන ට වඩා දෙගුණයක් දීප්තිමත්ය.
Observation data | |
---|---|
Sirius A | |
06පැය 45විනා 08.917තත් | |
−16° 42′ 58.02″ | |
Apparent magnitude (V) | −1.46 |
Sirius B | |
06පැය 45විනා 09.0තත් | |
−16° 43′ 06″ | |
Apparent magnitude (V) | 8.44 |
Characteristics | |
Sirius A | |
A0mA1 Va | |
U−B | −0.05 |
B−V | +0.00 |
Sirius B | |
White dwarf | |
DA2 | |
U−B | −1.04 |
B−V | −0.03 |
(Rv) | −5.50 km/s |
Sirius A | |
(μ) | RA: −546.01 /yr Dec.: −1,223.07 /yr |
(π) | 379.21 ± 1.58 |
8.60 ± 0.04 (2.64 ± 0.01 ) | |
(MV) | +1.43 |
Sirius B | |
(μ) | RA: −461.571 /yr Dec.: −914.520 /yr |
(π) | 374.4896 ± 0.2313 |
8.709 ± 0.005 (2.670 ± 0.002 ) | |
(MV) | +11.18 |
Orbit | |
Primary | α Canis Majoris A |
Companion | α Canis Majoris B |
(P) | 50.1284 ± 0.0043 yr |
(a) | 7.4957 ± 0.0025″ |
(e) | 0.59142 ± 0.00037 |
(i) | 136.336 ± 0.040° |
(Ω) | 45.400 ± 0.071° |
(T) | 1,994.5715 ± 0.0058 |
(ω) (secondary) | 149.161 ± 0.075° |
තොරතුරු පුවරුව | |
Sirius A | |
2.063±0.023 M☉ | |
1.711 | |
25.4 | |
(log g) | 4.33 |
9,940 K | |
[Fe/H] | 0.50 |
(v sin i) | 16 km/s |
242±5 | |
Sirius B | |
1.018 ± 0.011 M☉ | |
0.0084 ± 3% | |
Luminosity | 0.056 |
(log g) | 8.57 |
25,000 ± 200 K | |
(Age) | 228+10 −8 |
Dog Star, Aschere, Canicula, Al Shira, Sothis, Alhabor, Mrgavyadha, Lubdhaka, Tenrōsei, Canis Majoris (α CMa), Canis Majoris (9 CMa), 48915, 2491, −16°1591, 244, 219, 5423, 2638, 32349 | |
Sirius B: EGGR 49, WD 0642-166, 1577.00 | |
Database references | |
A | |
B |
ආශ්රිත ලිපි
සටහන්
මූලාශ්ර
උපහරණ
- "Sirius". Dictionary.com Unabridged (v 1.1). Random House, Inc. සම්ප්රවේශය 6 April 2008.
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- Bond, Howard E.; Schaefer, Gail H.; Gilliland, Ronald L.; Holberg, Jay B.; Mason, Brian D.; Lindenblad, Irving W.; et al. (2017). "The Sirius system and its astrophysical puzzles: Hubble Space Telescope and ground-based astrometry". The Astrophysical Journal. 840 (2): 70. :1703.10625. :2017ApJ...840...70B. doi:10.3847/1538-4357/aa6af8. 51839102.
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- (1976). "Cooling times, luminosity functions and progenitor masses of degenerate dwarfs". . 49: 375–385. :1976A&A....49..375S.
- Hinckley, Richard Allen (1899). Star-names and Their Meanings. New York: G. E. Stechert. pp. 117–129.
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- "Sirius A". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. සම්ප්රවේශය 20 October 2007.
- "Sirius B". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. සම්ප්රවේශය 23 October 2007.
භාහිර සබැඳි
dog days , යන්න නිදහස් ශබ්දකෝෂය වන වික්ෂනරිය දී සොයා බලන්න.
Sirius හා සබැඳි මාධ්ය විකිමාධ්ය කොමන්ස් හි ඇත.
- NASA Astronomy Picture of the Day: Sirius B in x-ray (6 October 2000)
- "Sirius Matters: Alien Contact". Chandra X-ray Center. 28 November 2000. සම්ප්රවේශය 21 March 2021.
- Sankey, John. "Getting Sirius About Time". www.johnsankey.ca. සම්ප්රවේශය 21 March 2021.
- Barker, Tho.; Stukeley, W. (1760). "Remarks on the Mutations of the Stars". Philosophical Transactions. 51: 498–504. doi:10.1098/rstl.1759.0049. 105393.