Upsilon Herculis

Star in the constellation Hercules

Upsilon Herculis  Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)

Constellation | Hercules
Right ascension | 16h 02m 47.89764s[1]
Declination | +46° 02′ 12.1371″[1]
Apparent magnitude (V) | 4.74[2]
Characteristics
Spectral type | B9 III[3]
U−B color index | −0.32[2]
B−V color index | −0.11[2]
Astrometry
Radial velocity (Rv)| +4.1±0.5[4] km/s
Proper motion (μ)|  RA: +55.42[1] mas/yr
Dec.: −61.29[1] mas/yr
Parallax (π)| 8.78±0.18 mas[1]
Distance| 371 ± 8 ly
(114 ± 2 pc)
Absolute magnitude (MV)| 0.32[5]
Details
Radius| 4.0[6] R☉
Luminosity| 173[7] L☉
Surface gravity (log g)| 3.80[8] cgs
Temperature| 10,152[7] K
Metallicity [Fe/H]| −0.30[8] dex
Rotational velocity (v sin i)| 7.5[4] km/s
Age| 254[5] Myr
Other designations
υ Her, 6 Her, BD+46°2142, HD 144206, HIP 78592, HR 5982, SAO 45865[9]
Database references
SIMBAD| data

Upsilon Herculis (υ Her) is a solitary[10] star in the constellation Hercules. It is visible to the naked eye with an apparent visual magnitude of 4.74.[2] Based upon an annual parallax shift of 8.78 mas as seen from Earth, it is located around 371 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.09 due to interstellar dust.[5]

At an estimated age of 254 million years,[5] this appears to be an evolved B-type giant star with a stellar classification of B9 III.[3] It is a mercury-manganese chemically peculiar star, indicating the spectrum shows abnormal abundances of these elements.[4] The star has about four times the radius of the Sun and it radiates 173[7] times the Sun's luminosity from its photosphere at an effective temperature of 10,152 K.[7]

## References

[edit]

1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
2. ^ a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
3. ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819
4. ^ a b c Adelman, S. J.; et al. (February 2006), "Elemental abundance analyses with DAO spectrograms. XXIX. The mercury-manganese stars 53 Tau, β Tau, γ Crv, and υ Her", Astronomy and Astrophysics, 447 (2): 685–690, Bibcode:2006A&A...447..685A, doi:10.1051/0004-6361:20053581.
5. ^ a b c d Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035, S2CID 119108982.
6. ^ Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics, 367 (3rd ed.): 521–524, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451, S2CID 425754.
7. ^ a b c d McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x, S2CID 118665352.
8. ^ a b Smith, K. C.; Dworetsky, M. M. (July 1993), "Elemental Abundances in Normal Late B-Stars and Hgmn-Stars from Co-Added IUE Spectra - Part One - Iron Peak Elements", Astronomy and Astrophysics, 274 (2): 335, Bibcode:1993A&A...274..335S.
9. ^ "* ups Her -- Star". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-04-05.`{{cite web}}`: CS1 maint: postscript (link)
10. ^ 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, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.

* v
* t
* e

Constellation of Hercules

* Hercules–Corona Borealis Great Wall
* Hercules in Chinese astronomy
* List of stars in Hercules

Stars|

| Bayer|

* α (Rasalgethi)
* β (Kornephoros)
* γ
* δ (Sarin)
* ε
* ζ
* η
* θ
* ι
* κ (Marsic)
* λ (Maasym)
* μ
* ν
* ξ
* ο
* π
* ρ
* σ
* τ
* υ
* φ
* χ
* ω (Cujam)

|

Flamsteed|

* 14
* 29 (h)
* 30 (g)
* 42
* 45 (l)
* 52
* 60
* 68 (u)
* 69 (e)
* 72 (w)
* 89
* 93
* 95 (Bodu)
* 98
* 99 (b)
* 102 (Ramus)
* 104 (A)
* 106
* 109 (Tusizuo)
* 110
* 111
* 112
* 32 Oph

Variable|

* X
* AC
* AM
* BL
* DI
* DQ
* V446
* V533
* V772
* V777
* V838
* V1674

HR|

* 6669
* 6697
* 6806

HD|

* 146389 (Irena)
* 147506 (Hunor)
* 149026 (Ogma)
* 152843
* 154345
* 155358
* 156668
* 159062
* 164595
* 164922

Other|

* BD +17° 3248
* Furuhjelm 46
* GD 362
* Gliese 623
* Gliese 638
* Gliese 649
* Gliese 686
* GJ 3991
* HAT-P-14 (Franz)
* HAT-P-18
* HAT-P-67
* Hercules X-1
* GSC 02620-00648
* Ross 640
* TOI-2109
* TOI-2119
* TrES-3 (Pipoltr)
* TYC 1031-1262-1
* WASP-103
* WISE 1738+2732
* WISE 1741+2553

| Exoplanets|

* 14 Herculis b
* c
* HAT-P-14b (Sissi)
* HD 149026 b (Smertrios)
* HD 164922 b
* c
* WASP-103b

|

| Star clusters|

* Messier 13
* Messier 92
* NGC 6229
* Palomar 14

|

| Nebulae|

* Abell 39
* NGC 6210

|

Galaxies|

| NGC|

* 6028
* 6039
* 6040
* 6041
* 6042
* 6043
* 6044
* 6045
* 6046
* 6047
* 6052
* 6053
* 6054
* 6055
* 6056
* 6057
* 6061
* 6078
* 6158
* 6166
* 6181
* 6207
* 6212
* 6239
* 6261
* 6263
* 6308
* 6452
* 6560

|

Other|

* 1ES 1741+196
* 2MASX J16270254+4328340
* 3C 334
* 3C 336
* 3C 345
* 3C 346
* A2261-BCG
* Arp 272 (NGC 6050 and IC 1179)
* AT2018cow
* IC 1182
* IC 1189
* Hercules Dwarf
* Hercules A
* IC 1192
* IC 4617
* Markarian 501
* MCG+07-33-027
* PGC 2046648
* PKS 1614+051
* QSR J1819+3845
* RX J1633.3+4718
* UGC 11105

| Galaxy clusters|

* Abell 2152
* Abell 2199
* Hercules Cluster
* Hercules Superclusters
* Zwicky's Triplet

|

| Astronomical events|

* LBG-2377

|

Category
*[RA:]: Right Ascension
*[Dec.:]: Declination
*[v]: View this template
*[t]: Discuss this template
*[e]: Edit this template