13 Delphini

{{Starbox begin

| name = 13 Delphini

}}

{{Starbox observe 2s

| epoch = J2000.0 (ICRS)

| constell = Delphinus

| component1 = A

| ra1 = {{RA|20|47|48.3330}}

| dec1 = {{DEC|+06|00|29.551}}

| appmag_v1 = 5.66

| component2 = B

| ra2 = {{RA|20|47|48.3012}}

| dec2 = {{DEC|+06|00|28.127}}

| appmag_v2 = 8.51

}}

{{Starbox character

| type = main sequence

| class = A0 V

| b-v = −0.01

| u-b = −0.09

}}

{{Starbox astrometry

| radial_v = −7{{±|4.3}}

| absmag_v = −0.01

}}

{{Starbox astrometry|no_heading=y

| component1 = A

| parallax = 6.9265

| p_error = 0.0489

| parallax_footnote =

| prop_mo_ra = +8.255

| prop_mo_dec = −13.162

| pm_footnote =

| component2 = B

| parallax2 = 6.6697

| p_error2 = 0.0989

| parallax_footnote2 =

| prop_mo_ra2 = +5.663

| prop_mo_dec2 = −12.280

| pm_footnote2 =

}}

{{Starbox detail

| mass = 2.51{{±|0.31|0.36}}

| radius = 3.7{{±|0.4}}

| luminosity = 119{{±|20|17}}

| gravity = 3.69{{±|0.61|0.69}}

| metal_fe = 0.00

| temperature = 9,840{{±|91|90}}

| rotational_velocity = 170

| age_myr = 307

}}

{{Starbox catalog

| names = {{odlist|F = 13 Del|Gould = 18 G. Delphini|BD = +05°4613|AG = +05°3035|GC = 28986|HD = 198069|HIP = 102633|HR = 7953|SAO = 126222|WDS = J20478+0600A}}

}}

{{Starbox reference

| Simbad = 13+Del

}}

13 Delphini is a binary star in the equatorial constellation Delphinus, with a combined apparent magnitude of 5.64. The system is located at a distance of 471 light years but is approaching the Solar System with a heliocentric radial velocity of about {{val|-7|ul=km/s}}.

13 Delphini A has an apparent magnitude of 5.66, while its companion has an apparent magnitude of 8.51. As of 2016, the pair have a separation of {{val|1.5|ul=arcsecond}} located at a position angle of {{val|200|ul=°}}.

13 Delphini has a blended stellar classification of A0 V, indicating that it is an ordinary A-type main-sequence star. However, when the components are analysed individually, the primary star is given a class of B9V. It has 2.51 times the mass of the Sun and has an effective temperature of 9,840 K. However, the star is large for its class, having a radius almost 4 times that of the Sun and a luminosity 119 times greater. This is due to 13 Delphini having completed 86.1% of its main sequence lifetime and has led one source to classify it as a subgiant instead. It spins rapidly with a projected rotational velocity of {{val|170|ul=km/s}} and has an age of 307 million years.

References

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}}

Category:Delphinus

Category:A-type main-sequence stars

Category:Binary stars