54 Aurigae

{{Short description|Multiple star system in the constellation Auriga}}

{{Starbox image

| image = 250px

| caption = A light curve for 54 Aurigae, plotted from TESS data

}}

{{Starbox observe 2s

| epoch = J2000

| constell = Auriga

| component1 = A

| ra1 = {{RA|06|39|33.12003}}

| dec1 = {{DEC|+28|15|47.2764}}

| appmag_v1 = 6.22

| component2 = B

| ra2 = {{RA|06|39|33.11965}}

| dec2 = {{DEC|+28|15|47.2740}}

| appmag_v2 = 7.82

}}

{{Starbox character

| type =

| class = B7 III

| b-v = {{Val|−0.087|0.007}}

| u-b =

| variable = Algol

}}

{{Starbox astrometry

| component1 = A

| radial_v = {{Val|+19.0|4.3}}

| prop_mo_ra = −5.461

| prop_mo_dec = −10.523

| parallax = 3.5961

| p_error = 0.0952

| parallax_footnote =

| absmag_v =

}}

{{Starbox detail

| source =

| component1 = 54 Aur A

| mass =

| radius =

| luminosity = 315.49

| temperature = 11,083

| metal_fe =

| gravity =

| rotational_velocity = 65

| age_gyr =

}}

{{Starbox catalog

| names = {{odlist | F=54 Aur | NSV=3065 | BD=+28°1196 | FK5=2504 | HD=47395 | HIP=31852 | HR=2438 | SAO=78593 | GC=8681 | ADS=5289 | WDS=J06395+2816 }}

}}

{{Starbox reference

| Simbad = 54+Aur

}}

54 Aurigae is a multiple star system located around {{convert|800|ly|lk=in}} 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. The system is moving further from the Sun with a heliocentric radial velocity of around +19 km/s.

54 Aurigae is resolved into two visible components, of magnitudes 6.22 and 7.82, separated by {{val|0.8|ul="}}. The double was discovered in 1843 when the separation was only {{val|0.7|u="}}. There is no separate measure of the parallax of the secondary, but it shares a common proper motion with the brighter star and they are assumed to form a binary. 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. 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.

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. It is radiating 315 times the luminosity of the Sun from its photosphere at an effective temperature of {{convert|11083|K}}, and is spinning with a projected rotational velocity of {{convert|65|km/s}}.

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Category:B-type giants

Category:Suspected variables

Category:Binary stars

Category:Auriga

Category:Durchmusterung objects