35 Cygni

Binary star in the constellation Cygnus

35 Cygni

Location of 35 Cyg (circled)

Observation data
Epoch J2000 Equinox J2000
Constellation | Cygnus
Right ascension | 20h 18m 39.06986s[1]
Declination | +34° 58′ 57.9909″[1]
Apparent magnitude (V) | 5.18[2]
Characteristics
Spectral type | F6Ib[3]
B−V color index | +0.62[2]
Astrometry
Radial velocity (Rv)| −20.20[4] km/s
Proper motion (μ)|  RA: −0.05[1] mas/yr
Dec.: −3.77[1] mas/yr
Parallax (π)| 1.03 ± 0.21 mas[1]
Distance| approx. 3,200 ly
(approx. 1,000 pc)
Absolute magnitude (MV)| −3.99[5]
Details
Mass| 10.0[6] M☉
Radius| 51[7] R☉
Luminosity| 7,093[8] L☉
Surface gravity (log g)| 1.5[6] \- 2.4[5] cgs
Temperature| 6,360[5] K
Metallicity [Fe/H]| 0.02[5] dex
Rotational velocity (v sin i)| 3.5[6] km/s
Age| 22[9] Myr
Other designations

35 Cyg, HR 7770, BD+34°3967, HD 193370, SAO 69806, FK5 3627, HIP 100122

Database references
SIMBAD| data

35 Cygni is a spectroscopic binary star in the constellation Cygnus. Its apparent magnitude is 5.18. Located around 1,000 parsecs (3,300 ly) distant, its primary is a yellow supergiant of spectral type F6Ib, a massive star that has used up its core hydrogen and is now fusing heavier elements.

Yellow supergiants are usually variable, often Classical Cepheid variables, but 35 Cyg is notable for having an especially constant brightness.[10]

35 Cyg is a single-lined spectroscopic binary with a period of 2,440 days (over 6 years).[11] The secondary cannot be seen directly, nor can its spectral lines be identified but the overall spectrum can be match by a combination of an F4 supergiant and a less luminous B6.5 star.[12]

## 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 18759600.653-664&rft.date=2007&rft_id=info:arxiv/0708.1752&rft_id=https://api.semanticscholar.org/CorpusID:18759600#id-name=S2CID&rft_id=info:doi/10.1051/0004-6361:20078357&rft_id=info:bibcode/2007A&A...474..653V;&rft.aulast=Van+Leeuwen&rft.aufirst=F.&rfr_id=info:sid/en.wikipedia.org:35+Cygni" class="Z3988">
2. ^ a b Luck, R. Earle (2014). "Parameters and Abundances in Luminous Stars". The Astronomical Journal. 147 (6): 137. Bibcode:2014AJ....147..137L. doi:10.1088/0004-6256/147/6/137.
3. ^ Abt, Helmut A. (2009). "MK Classifications of Spectroscopic Binaries". The Astrophysical Journal Supplement. 180 (1): 117–118\. Bibcode:2009ApJS..180..117A. doi:10.1088/0067-0049/180/1/117. S2CID 122811461.117-118&rft.date=2009&rft_id=https://api.semanticscholar.org/CorpusID:122811461#id-name=S2CID&rft_id=info:doi/10.1088/0067-0049/180/1/117&rft_id=info:bibcode/2009ApJS..180..117A&rft.aulast=Abt&rft.aufirst=Helmut+A.&rfr_id=info:sid/en.wikipedia.org:35+Cygni" class="Z3988">
4. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771\. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.759-771&rft.date=2006&rft_id=info:arxiv/1606.08053&rft_id=https://api.semanticscholar.org/CorpusID:119231169#id-name=S2CID&rft_id=info:doi/10.1134/S1063773706110065&rft_id=info:bibcode/2006AstL...32..759G&rft.aulast=Gontcharov&rft.aufirst=G.+A.&rfr_id=info:sid/en.wikipedia.org:35+Cygni" class="Z3988">
5. ^ a b c d Kovtyukh, V. V.; Gorlova, N. I.; Belik, S. I. (2012). "Accurate luminosities from the oxygen λ7771-4 Å triplet and the fundamental parameters of F-G supergiants". Monthly Notices of the Royal Astronomical Society. 423 (4): 3268. arXiv:1204.4115. Bibcode:2012MNRAS.423.3268K. doi:10.1111/j.1365-2966.2012.21117.x. S2CID 118683158.
6. ^ a b c Lyubimkov, Leonid S.; Lambert, David L.; Kaminsky, Bogdan M.; Pavlenko, Yakov V.; Poklad, Dmitry B.; Rachkovskaya, Tamara M. (2012). "Lithium abundance in atmospheres of F- and G-type supergiants and bright giants". Monthly Notices of the Royal Astronomical Society. 427 (1): 11–26\. arXiv:1212.6057. Bibcode:2012MNRAS.427...11L. doi:10.1111/j.1365-2966.2012.21617.x. S2CID 119191810.11-26&rft.date=2012&rft_id=info:arxiv/1212.6057&rft_id=https://api.semanticscholar.org/CorpusID:119191810#id-name=S2CID&rft_id=info:doi/10.1111/j.1365-2966.2012.21617.x&rft_id=info:bibcode/2012MNRAS.427...11L&rft.aulast=Lyubimkov&rft.aufirst=Leonid+S.&rft.au=Lambert,+David+L.&rft.au=Kaminsky,+Bogdan+M.&rft.au=Pavlenko,+Yakov+V.&rft.au=Poklad,+Dmitry+B.&rft.au=Rachkovskaya,+Tamara+M.&rft_id=https://doi.org/10.1111%2Fj.1365-2966.2012.21617.x&rfr_id=info:sid/en.wikipedia.org:35+Cygni" class="Z3988">
7. ^ Pasinetti Fracassini, L. E.; Pastori, L.; Covino, S.; Pozzi, A. (2001). "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics". Astronomy and Astrophysics. 367 (2): 521. arXiv:astro-ph/0012289. Bibcode:2001A&A...367..521P. doi:10.1051/0004-6361:20000451. S2CID 425754.
8. ^ McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357\. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.343-357&rft.date=2012&rft_id=info:arxiv/1208.2037&rft_id=https://api.semanticscholar.org/CorpusID:118665352#id-name=S2CID&rft_id=info:doi/10.1111/j.1365-2966.2012.21873.x&rft_id=info:bibcode/2012MNRAS.427..343M&rft.aulast=McDonald&rft.aufirst=I.&rft.au=Zijlstra,+A.+A.&rft.au=Boyer,+M.+L.&rft_id=https://doi.org/10.1111%2Fj.1365-2966.2012.21873.x&rfr_id=info:sid/en.wikipedia.org:35+Cygni" class="Z3988">
9. ^ Lyubimkov, Leonid S.; Lambert, David L.; Rostopchin, Sergey I.; Rachkovskaya, Tamara M.; Poklad, Dmitry B. (2010). "Accurate fundamental parameters for A-, F- and G-type Supergiants in the solar neighbourhood". Monthly Notices of the Royal Astronomical Society. 402 (2): 1369. arXiv:0911.1335. Bibcode:2010MNRAS.402.1369L. doi:10.1111/j.1365-2966.2009.15979.x. S2CID 119096173.
10. ^ Adelman, S. J.; Cay, I. H.; Cay, M. T.; Kocer, D. (2000). "On the Variability of A6 to F9 Supergiants". Information Bulletin on Variable Stars. 4947: 1. Bibcode:2000IBVS.4947....1A.
11. ^ Pourbaix, D.; Tokovinin, A. A.; Batten, A. H.; Fekel, F. C.; Hartkopf, W. I.; Levato, H.; Morrell, N. I.; Torres, G.; Udry, S. (2004). "SB9: The ninth catalogue of spectroscopic binary orbits". Astronomy and Astrophysics. 424 (2): 727–732\. arXiv:astro-ph/0406573. Bibcode:2004A&A...424..727P. doi:10.1051/0004-6361:20041213. S2CID 119387088.727-732&rft.date=2004&rft_id=info:arxiv/astro-ph/0406573&rft_id=https://api.semanticscholar.org/CorpusID:119387088#id-name=S2CID&rft_id=info:doi/10.1051/0004-6361:20041213&rft_id=info:bibcode/2004A&A...424..727P;&rft.aulast=Pourbaix&rft.aufirst=D.&rft.au=Tokovinin,+A.+A.&rft.au=Batten,+A.+H.&rft.au=Fekel,+F.+C.&rft.au=Hartkopf,+W.+I.&rft.au=Levato,+H.&rft.au=Morrell,+N.+I.&rft.au=Torres,+G.&rft.au=Udry,+S.&rfr_id=info:sid/en.wikipedia.org:35+Cygni" class="Z3988">
12. ^ Parsons, Sidney B.; Ake, Thomas B. (1998). "Ultraviolet and Optical Studies of Binaries with Luminous Cool Primaries and Hot Companions. V. The Entire IUE Sample". The Astrophysical Journal Supplement Series. 119 (1): 83. Bibcode:1998ApJS..119...83P. doi:10.1086/313152.

* v
* t
* e

Constellation of Cygnus

* List of stars in Cygnus

Stars|

| Bayer|

* α (Deneb)
* β (Albireo)
* γ (Sadr)
* δ (Fawaris)
* ε (Aljanah)
* ζ
* η
* θ
* ι1
* ι2
* κ
* λ
* μ
* ν
* ξ
* o1
* o2
* ο3
* π1 (Azelfafage)
* π2
* ρ
* σ
* τ
* υ
* φ
* χ
* ψ
* ω1
* ω2
* P
* Q

|

Flamsteed|

* 2
* 4
* 8
* 9
* 15
* 16 (c)
* 17
* 20 (d)
* 22
* 23
* 26 (e)
* 27 (b1)
* 28 (b2)
* 29 (b3)
* 33
* 35
* 39
* 41
* 47
* 52
* 55
* 56
* 57
* 59 (f1)
* 61
* 63 (f2)
* 68 (A)
* 71 (g)
* 72
* 74
* 75

Variable|

* R
* T
* W
* X
* Y
* RW
* SS
* SU
* TT
* AZ
* BC
* BI
* CH
* KY
* V380
* V389
* V404
* V476
* V1027
* V1057
* V1143
* V1191
* V1334
* V1489
* V1500
* V1668
* V1794
* V1974
* V2214
* V2513

HR|

* 7633
* 7767
* 7912
* 8193

HD|

* 185269
* 185351
* 187123
* 188753
* 190655
* 191806
* 197037

Gliese|

* 777
* 806
* 1245

Kepler|

* 2
* 3
* 5
* 6
* 11
* 15
* 16
* 17
* 18
* 22
* 23
* 27
* 28
* 29
* 31
* 32
* 33
* 34
* 35
* 36
* 39
* 40
* 41
* 42
* 43
* 44
* 45
* 47
* 51
* 56
* 61
* 63
* 64 (PH1)
* 66
* 67
* 68
* 69
* 70
* 78
* 80
* 84
* 86 (PH2)
* 87
* 89
* 107
* 167
* 182
* 186
* 223
* 289
* 371
* 385
* 411
* 419
* 432
* 445
* 451
* 452
* 560
* 737
* 1229
* 1520
* 1625
* 1649
* 1708

WR|

* 133
* 134
* 135
* 136
* 137
* 138a
* 140
* 142
* 147
* 148
* 150

Other|

* AFGL 2591
* BD+40° 4210
* BD+43 3654
* Cygnus OB2 #8A
* Cygnus OB2 #12
* Cygnus X-1
* Cygnus X-3
* G79.29+0.46
* G 208-44
* G 208-45
* GSC 03949-00967
* HAT-P-17
* KELT-9
* KELT-20
* KIC 8462852
* KIC 9832227
* KIC 9970396
* KIC 11026764
* KIC 11145123
* KOI-5
* KOI-74
* KOI-81
* KOI-256
* MWC 349
* N6946-BH1
* PSR J2032+4127
* SPECULOOS-3
* W75N(B)-VLA2
* WASP-48
* WISE J2000+3629
* Wolf 1069

Star
clusters|

| Association|

* Cygnus OB2
* Cygnus OB7
* Cygnus OB9

|

Open|

* Berkeley 86
* DR 6
* IC 5146
* Messier 29
* Messier 39
* NGC 6811
* NGC 6819
* NGC 6834
* NGC 6866
* NGC 6871
* NGC 6910

Molecular
clouds|

* Cygnus X (including DR 21)

Nebulae|

| Dark|

* Barnard 146
* Barnard 147
* IC 5146
* L1014

|

H II|

* NGC 6914
* North America Nebula
* Pelican Nebula
* Sadr Region
* Sh2-101
* Sh2-106

Planetary|

* Abell 78
* Egg Nebula
* IRAS 19475+3119
* IRAS 20324+4057
* Kronberger 61
* M1-92
* NGC 6826
* NGC 6881
* NGC 6884
* NGC 7008
* NGC 7026
* NGC 7027
* NGC 7048
* Soap Bubble Nebula

WR|

* Crescent Nebula

SNR|

* Cygnus Loop (including Veil Nebula)

Galaxies|

| NGC|

* 6801
* 6946
* 7013

|

Other|

* 3C 438
* 4C +48.48
* Cygnus A
* ZTF J203349.8+322901.1

Exoplanets|

| Kepler|

* 2b
* 3b
* 3c
* 5b
* 6b
* 11b
* 15b
* 16b
* 17b
* 22b
* 23b
* 28b
* 32b
* 33b
* 34b
* 36b
* 39b
* 40b
* 41b
* 47b
* 56b
* 61b
* 64b (PH1b)
* 68b
* 69b
* 70b
* 78b
* 87c
* 186b
* e
* f
* 371b
* c
* 409b
* 419b
* 432b
* 451b
* 452b
* 560b
* 737b
* 1229b
* 1520b
* 1625b
* 1652b
* 1658b
* 1649b
* c
* 1708b

|

Other|

* b3 Cygni b
* HD 185269 b
* HD 187123 b
* c
* HD 191806 b
* KELT-9b
* KELT-20b
* TrES-5b

Exomoons|

| Kepler|

* 1625b I
* 1708b I

|

*[RA:]: Right Ascension
*[Dec.:]: Declination
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