HD 15920

Short description: Giant star in the constellation Cassiopeia

HD 15920  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Cassiopeia
Right ascension |  02h 38m 02.03097s[1]
Declination | +72° 49′ 05.7106″[1]
Apparent magnitude (V) | 5.17[2]
Characteristics
Spectral type | G8III[3]
B−V color index | +0.896±0.003[2]
Astrometry
Radial velocity (Rv)| −3.69±0.13[1] km/s
Proper motion (μ)|  RA: −27.441[1] mas/yr
Dec.: +15.627[1] mas/yr
Parallax (π)| 12.1723 ± 0.1139[1] mas
Distance| 268 ± 3 ly
(82.2 ± 0.8 pc)
Absolute magnitude (MV)| 0.70[2]
Details
Mass| 2.55±0.68[4] M☉
Radius| 10.06+0.15
−0.17[1] R☉
Luminosity| 60.7±0.7[1] L☉
Surface gravity (log g)| 2.91±0.11[4] cgs
Temperature| 5,080+37
−42[1] K
Metallicity [Fe/H]| 0.02±0.05[4] dex
Age| 977+198
−164[4] Myr
Other designations

BD+72°140, FK5 87, GC 3116, HD 15920, HIP 12273, HR 743, SAO 4694, GSC 04320-02109[5]

Database references
SIMBAD| data

HD 15920 is a single[6] star in the northern constellation of Cassiopeia. It has a yellow hue and is visible to the naked eye as a dim point of light with an apparent visual magnitude of 5.17.[2] This object is located at a distance of approximately 268 light years from the Sun based on parallax, but it is drifting closer with a radial velocity of −4 km/s.[1]

This object is an aging giant star with a stellar classification of G8III.[3] After exhausting the supply of hydrogen at its core, this star has cooled and expanded off the main sequence – at present it has ten times the girth of the Sun.[1] The star is around a billion years old[4] with 2.6[4] times the mass of the Sun. It is radiating 61 times the Sun's luminosity from its swollen photosphere at an effective temperature of 5,080 K.[1] HD 15920 is the most likely source for the X-ray emission detected at these coordinates.[7]

## References

1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 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.
2. ↑ 2.0 2.1 2.2 2.3 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
3. ↑ 3.0 3.1 Roman, Nancy G. (July 1952), "The Spectra of the Bright Stars of Types F5-K5", Astrophysical Journal 116: 122, doi:10.1086/145598, Bibcode: 1952ApJ...116..122R.
4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Feuillet, Diane K. et al. (2016), "Determining Ages of APOGEE Giants with Known Distances", The Astrophysical Journal 817 (1): 40, doi:10.3847/0004-637X/817/1/40, Bibcode: 2016ApJ...817...40F.
5. ↑ "HD 15920". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+15920.
6. ↑ 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.
7. ↑ Haakonsen, Christian Bernt; Rutledge, Robert E. (September 2009), "XID II: Statistical Cross-Association of ROSAT Bright Source Catalog X-ray Sources with 2MASS Point Source Catalog Near-Infrared Sources", The Astrophysical Journal Supplement 184 (1): 138–151, doi:10.1088/0067-0049/184/1/138, Bibcode: 2009ApJS..184..138H.

* v
* t
* e

Cassiopeia constellation

Stars
(list)|

| Bayer|

* α (Schedar)
* β (Caph)
* γ
* δ (Ruchbah)
* ε (Segin)
* ζ (Fulu)
* η (Achird)
* θ
* ι
* κ
* λ
* μ
* ν
* ξ
* ο
* π
* ρ
* σ
* τ
* υ1
* υ2 (Castula)
* φ
* χ
* ψ
* ω

|

Flamsteed|

* 1
* 2
* 4
* 6
* 9
* 10
* 12
* 13
* 16
* 23
* 31
* 32
* 35
* 38
* 40
* 42
* 43
* 44
* 47
* 48 (A)
* 49
* 50
* 51
* 52
* 53
* 54
* 55

Variable|

* R
* S
* T
* V
* RW
* RX
* RZ
* SU
* SX
* SZ
* TU
* TV
* TW
* TX
* TY
* TZ
* UU
* UV
* VX
* WW
* WZ
* XX
* XY
* YZ (21)
* ZZ
* AB
* AO
* AQ
* AR
* AZ
* BH
* BM
* BS
* BY
* CC
* CE
* CF
* CG
* CH
* CW
* DL
* DN
* DO
* HT
* IR
* IT
* IV
* IX
* OX
* PV
* PZ
* QQ
* QX
* V364
* V368
* V373
* V376
* V381
* V425
* V436
* V459
* V465
* V482
* V487
* V509
* V523
* V526
* V540
* V547
* V551
* V559
* V567
* V592
* V623
* V627
* V636
* V638
* V639
* V640
* V641
* V649
* V650
* V664
* V705
* V709
* V723
* V742
* V745
* V746
* V761
* V762
* V773
* V801
* V805
* V812
* V819
* V987
* V988
* V1022

HR|

* 60
* 62
* 96
* 112
* 113
* 124
* 129
* 135
* 144
* 146
* 164
* 177
* 181
* 196
* 200
* 207
* 212
* 233
* 237
* 241
* 244
* 250
* 256
* 260
* 261
* 266
* 273
* 278
* 287
* 292
* 297
* 298
* 316
* 318
* 326
* 342
* 375
* 381
* 391
* 398
* 428
* 439
* 461
* 482
* 488
* 502
* 561
* 567
* 579
* 626
* 743
* 747
* 791
* 839
* 860
* 861
* 922
* 932
* 1080
* 8761
* 8778
* 8803
* 8832
* 8853
* 8881
* 8886
* 8894
* 8981
* 8985
* 8990
* 9000
* 9010
* 9019
* 9020
* 9028
* 9063
* 9079
* 9083
* 9085
* 9094

HD|

* 108
* 371
* 1142
* 1601
* 5459
* 5927
* 7924
* 9811
* 15558
* 15570
* 15629
* 17156
* 17505
* 17520
* 19439
* 219415
* 222748
* 240210
* 240429
* 240430

Other|

* BD+60°2522
* 1E 2259+586
* Gliese 49
* Gliese 82
* Gliese 83.3
* IGR J00234+6141
* IGR J00291+5934
* IRAS 00338+6312
* IRAS 23304+6147
* LkHα 198
* LS I +61 303
* MWC 419
* MWC 1080
* OH 127.8+0.0
* PSR B2319+60
* PSR B2334+61
* PSR J0205+6449
* RNO 1B
* RX J0146.9+6121
* 2S 0114+650
* Tycho G
* 4U 0115+634
* 4U 0142+61
* W3 IRS 5
* WR 1
* WR 2
* WR 3

Star clusters|

| Open|

* Messier 52
* Messier 103
* NGC 103
* NGC 110
* NGC 129
* NGC 133
* NGC 136
* NGC 146
* NGC 189
* NGC 225
* NGC 358
* NGC 366
* NGC 381
* NGC 433
* NGC 436
* NGC 457
* NGC 559
* NGC 609
* NGC 637
* NGC 654
* NGC 657
* NGC 659
* NGC 663
* NGC 743
* NGC 886
* NGC 1027
* NGC 7788
* NGC 7789
* NGC 7790
* Stock 2
* Trumpler 3

|

Molecular clouds|

* AFGL 437
* IRAS 00338+6312
* Westerhout 3

Nebulae|

| H II|

* Heart Nebula
* NGC 281
* NGC 7635
* Sh 2-152
* S 201
* W3A
* W3(OH)
* Westerhout 5

|

Planetary|

* IC 289
* IC 1747
* IC 1805
* WeBo 1

SNR|

* Cassiopeia A
* CTB 1
* CTB 109
* HB 3
* Hubble 12

Pulsar wind|

* 3C 58

Galaxies|

| NGC|

* 147
* 185
* 278
* 1343

|

Other|

* Andromeda VII
* 3C 20
* 3C 22
* 3C 33.1
* 3C 35
* DW 0224+67
* Dwingeloo 1
* 1ES 2344+514
* IC 10
* IERS B2352+495
* Maffei 1
* Maffei 2
* QSO B0153+744

Other|

* GRB 041219A
* SN 1181
* SN 1572

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