54 Aurigae

Short description: Multiple star system in the constellation Auriga

54 Aurigae

A light curve for 54 Aurigae, plotted from TESS data[1]

Observation data
{{#ifeq:J2000|J2000.0 (ICRS)|Epoch J2000.0 Equinox J2000.0 (ICRS)| Epoch J2000 [[Astronomy:Equinox (celestial coordinates)|Equinox J2000}}
Constellation | Auriga

Right ascension |  06h 39m 33.12003s[2]
Declination | +28° 15′ 47.2764″[2]
Apparent magnitude (V) | 6.22[3]

Right ascension |  06h 39m 33.11965s[2]
Declination | +28° 15′ 47.2740″[2]
Apparent magnitude (V) | 7.82[3]
Characteristics
Spectral type | B7 III[4]
B−V color index | −0.087±0.007[5]
Variable type | Algol[6]
Astrometry

Radial velocity (Rv)| +19.0±4.3[5] km/s
Proper motion (μ)|  RA: −5.461[2] mas/yr
Dec.: −10.523[2] mas/yr
Parallax (π)| 3.5961 ± 0.0952[2] mas
Distance| 910 ± 20 ly
(278 ± 7 pc)
Details
54 Aur A
Luminosity| 315.49[7] L☉
Temperature| 11,083[7] K
Rotational velocity (v sin i)| 65[8] km/s
Other designations

54 Aur, NSV 3065, BD+28°1196, FK5 2504, GC 8681, HD 47395, HIP 31852, HR 2438, SAO 78593, ADS 5289, WDS J06395+2816[9]

Database references
SIMBAD| data

54 Aurigae is a multiple star system located around 800 light-years (51,000,000 AU) away from the Sun in the northern constellation of Auriga. It is visible to the naked eye as a dim, blue-white hued star with a combined apparent visual magnitude of 6.02.[5] The system is moving further from the Sun with a heliocentric radial velocity of around +19 km/s.[5]

54 Aurigae is resolved into two visible components, of magnitudes 6.22 and 7.82, separated by 0.8″. The double was discovered in 1843 when the separation was only 0.7″.[10] There is no separate measure of the parallax of the secondary, but it shares a common proper motion with the brighter star[11] and they are assumed to form a binary.[10] The spectral class B7 III is assigned to the brighter of the pair, indicating a hot giant star, although it has also been given as B7/8 III/V, suggesting it may be a main sequence star.[12] Most sources can't give a separate spectral classification for the fainter star, but it has been listed as DA1/K4V, indicating it is either a white dwarf or red dwarf.[13]

The brighter component of the visible pair is an eclipsing binary with a period of 1.8797 days, and a primary eclipse depth of 0.03 magnitudes.[14] It is radiating 315 times the luminosity of the Sun from its photosphere at an effective temperature of 11,083 K (10,810 °C; 19,490 °F),[7] and is spinning with a projected rotational velocity of 65 kilometres per second (40 mi/s).[8]

## References

1. ↑ MAST: Barbara A. Mikulski Archive for Space Telescopes, Space Telescope Science Institute, https://mast.stsci.edu/portal/Mashup/Clients/Mast/Portal.html, retrieved 7 October 2022.
2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
3. ↑ 3.0 3.1 Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society 389 (2): 869–879, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E.
4. ↑ Cucchiaro, A. et al. (October 1977), "Spectral classification from the ultraviolet line features of S2/68 spectra. II - Late B-type stars", Astronomy and Astrophysics Supplement Series 30: 71–79, Bibcode: 1977A&AS...30...71C.
5. ↑ 5.0 5.1 5.2 5.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
6. ↑ NSV 3065, AAVSO, https://www.aavso.org/vsx/index.php?view=detail.top&oid=41689, retrieved 7 October 2022.
7. ↑ 7.0 7.1 7.2 McDonald, I. et al. (2012), "Fundamental parameters and infrared excesses of Hipparcos stars", Monthly Notices of the Royal Astronomical Society 427 (1): 343–357, doi:10.1111/j.1365-2966.2012.21873.x, Bibcode: 2012MNRAS.427..343M.
8. ↑ 8.0 8.1 Abt, Helmut A. et al. (July 2002), "Rotational Velocities of B Stars", The Astrophysical Journal 573 (1): 359–365, doi:10.1086/340590, Bibcode: 2002ApJ...573..359A
9. ↑ "54 Aur". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=54+Aur.
10. ↑ 10.0 10.1 Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001), "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog", The Astronomical Journal 122 (6): 3466–3471, doi:10.1086/323920, ISSN 0004-6256, Bibcode: 2001AJ....122.3466M.
11. ↑ Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
12. ↑ Clausen, J. V.; Jensen, K. S. (1979), "Classification Based on 102/A/Mm Objective Prism Spectra", IAU Colloq. 47: Spectral Classification of the Future 9: 479, Bibcode: 1979RA......9..479C.
13. ↑ Pickles, A.; Depagne, É. (2010), "All-Sky Spectrally Matched UBVRI - ZY and u′ g′ r′ i′ z′ Magnitudes for Stars in the Tycho2 Catalog", Publications of the Astronomical Society of the Pacific 122 (898): 1437, doi:10.1086/657947, Bibcode: 2010PASP..122.1437P.
14. ↑ Wraight, K. T.; White, Glenn J.; Bewsher, D.; Norton, A. J. (October 2011), "STEREO observations of stars and the search for exoplanets", Monthly Notices of the Royal Astronomical Society 416 (4): 2477–2493, doi:10.1111/j.1365-2966.2011.18599.x, Bibcode: 2011MNRAS.416.2477W.

* v
* t
* e

Auriga constellation

Stars (list)|

| Bayer|

* α (Capella)
* β (Menkalinan)
* δ
* ε (Almaaz)
* ζ (Saclateni)
* η (Haedus)
* θ (Mahasim)
* ι (Hassaleh)
* κ
* λ (Alhurr)
* μ
* ν
* ξ
* ο
* π
* ρ
* σ
* τ
* υ
* φ
* χ
* ψ1
* ψ2
* ψ3
* ψ4
* ψ5
* ψ6
* ψ7
* ψ8
* ψ9
* ω

|

Flamsteed|

* 2
* 5
* 6
* 9
* 12
* 14
* 16
* 18
* 19
* 22
* 26
* 28
* 36
* 38
* 39
* 40
* 41
* 42
* 43
* 45
* 47
* 49
* 51
* 53
* 54
* 59
* 60
* 62
* 63
* 64
* 65
* 66
* 25 Cam
* 33 Cam
* 34 Cam
* 35 Cam

Variable|

* R
* T
* RT (48)
* RU
* RW
* RX
* SS
* SU
* SX
* SY
* TT
* TZ
* UU
* UV
* UY
* ZZ
* WW
* AB
* AE
* AP
* AR (17)
* BF
* BK
* CL
* CQ
* EO
* FS
* GM
* HL
* HP
* HS
* HZ
* IM
* IQ
* IU
* KR
* LY
* MZ
* NO
* NV
* NY
* PU
* QR
* V352
* V363
* V382
* V390
* V394
* V403
* V405
* V410
* V414
* V420
* V433
* V440
* V538

HR|

* 1501
* 1528
* 1529
* 1535
* 1550
* 1558
* 1573
* 1615
* 1626
* 1639
* 1644
* 1668
* 1669
* 1692
* 1725
* 1733
* 1738
* 1752
* 1760
* 1775
* 1776
* 1794
* 1795
* 1796
* 1804
* 1822
* 1824
* 1825
* 1850
* 1854
* 1866
* 1869
* 1884
* 1904
* 1938
* 1945
* 1979
* 2003
* 2025
* 2038
* 2046
* 2066
* 2080
* 2081
* 2096
* 2105
* 2110
* 2112
* 2115
* 2122
* 2137
* 2139
* 2141
* 2147
* 2153
* 2172
* 2188
* 2189
* 2272
* 2319
* 2434
* 2452
* 2464
* 2471
* 2532
* 2542
* 2556
* 2573
* 2675
* 2775
* 2792

HD|

* 33463
* 33632
* 34078
* 34656
* 35202
* 35619
* 35681
* 37250
* 38200
* 38229
* 40650
* 40979
* 43691
* 45350
* 49364
* 49674 (Nervia)
* 51021
* 56171

Gliese|

* Gliese 268

Other|

* G 87-7
* GD 66
* HAT-P-9
* KELT-2A
* MWC 480
* SGR 0501+4516
* UGPS J0521+3640
* WASP-12

Star clusters|

| Open|

* Messier 36
* Messier 37
* Messier 38
* NGC 1664
* NGC 1724
* NGC 1778
* NGC 1798
* NGC 1857
* NGC 1883
* NGC 1893
* NGC 1907
* NGC 1931
* NGC 2013
* NGC 2126
* NGC 2165
* NGC 2192
* NGC 2240
* NGC 2281

|

Globular|

* Palomar 2

Nebulae|

| Star-forming|

* AFGL 5142
* IC 405 (Flaming Star Nebula)
* IRAS 05345+3157
* IRAS 05358+3543
* L1512
* L1517B
* S235
* S235 B

|

Planetary|

* IC 2149
* NGC 2242

SNR|

* HB 9
* VRO 42.05.01

Galaxies|

| NGC|

* 2208
* 2303
* 2387

|

Other|

* 3C 147
* 4C 41.17
* DA 93
* MCG +8-11-11
* OH 471
* QSO B0710+439
* QSO B0711+356

Galaxy
clusters|

* MACS J0717.5+3745

Other|

* GRB 910503
* GRB 980329

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