Kepler-737

Short description: Red dwarf star in Cygnus

Coordinates:  19h 27m 27.085s, +46° 25′ 45.89″

Kepler-737  Observation data
Equinox J2000.0]] (ICRS)

Constellation | Cygnus[1]
Right ascension |  19h 27m 27.085s[2]
Declination | +46° 25′ 45.29″[2]
Characteristics
Evolutionary stage | main-sequence[3]
Spectral type | M0V[3]
Apparent magnitude (G) | 15.127694[4]
Apparent magnitude (J) | 12.910[4]
Apparent magnitude (H) | 12.293[4]
Apparent magnitude (K) | 12.097[4]
Apparent magnitude (B) | 17.861[5]
Apparent magnitude (V) | 15.971[5]
Apparent magnitude (W) | 11.969[5]
Astrometry
Proper motion (μ)|  RA: 20.094[2] mas/yr
Dec.: −19.889[2] mas/yr
Parallax (π)| 4.8590 ± 0.0194[2] mas
Distance| 671 ± 3 ly
(205.8 ± 0.8 pc)
Details
Mass| 0.510+0.0026−0.0027[1] M☉
Radius| 0.480+0.0026−0.0024[1] R☉
Luminosity| ~0.045[5] L☉
Surface gravity (log g)| 4.722±0.008[5] cgs
Temperature| 3,813+40.127−38.492[3] K
Metallicity [Fe/H]| −0.24+0.087
−0.081[5] dex
Age| 3.89[5] Gyr
Other designations

Database references
SIMBAD| data

Kepler-737 is an M-type main-sequence red dwarf located 671 light-years away on the border of the constellation Cygnus. [6]

## Contents

* 1 Physical properties
* 1.1 General properties
* 1.2 Astrometry and characteristics
* 2 Planetary system
* 3 References

## Physical properties

### General properties

Kepler-737 is around half the size of the Sun, with a mass of 0.51 solar masses and a radius of 0.48 solar radii.[1] Its spectral class is M0V, its temperature is about 3,813 Kelvin, and it has a brightness of 0.045 solar luminosity.[5] One Kepler Object of Interest (KOI) table claimed the star to be ~14 billion years old.[5]

As for the logarithm of the relative abundance of iron and hydrogen, its metallicity [Fe/H] is −0.24+0.087
−0.081 dex, significantly lower than the Sun's. Its density is roughly 5.239±0.265 g/cm3, or about 3 times denser than the Sun;[5] while its surface gravity is stronger than the Sun, with log g of 4.722±0.008 cgs.[5]

### Astrometry and characteristics

SIMBAD data indicate that its proper motion is 20.094 mas/yr for right ascension, −19.889 mas/yr for declination, its parallax is 4.859 mas.[4]

## Planetary system

The star has one known planet, Kepler-737b.

The Kepler-737 planetary system  Companion
(in order from star) | Mass | Semimajor axis
(AU) | Orbital period
(days) | Eccentricity | Inclination | Radius[6]

|
|
|
|
|
|

b | ~4.5 M⊕ | 0.035  | 28.592  | 0  | 89.99° | 1.96±0.11 R⊕

Main article: Astronomy:Kepler-737b

Kepler-737b[6] was confirmed on May 18, 2016 from data collected earlier by the Kepler space telescope, notable for orbiting in the habitable zone but not likely to be habitable because it is tidally locked.[7][8][9] It may, however, have atmospheric circulation that would distribute the heat around the planet, potentially making a large portion of it habitable, although given its stellar flux the most likely scenario is that the planet's surface is too hot to be habitable. Water on its surface could also distribute heat.

On the note of the Exoplanet Archive, Kepler-737b was dedicated that orbital period, transit mid-point, transit duration, Rp/Rs, and their errors are taken from DR24 KOI table.[5]

## References

1. ↑ 1.0 1.1 1.2 1.3 "Kepler-737". https://www.universeguide.com/star/122022/kepler737. Retrieved May 18, 2016.
2. ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
3. ↑ 3.0 3.1 3.2 "Kepler-737". http://www.exoplanetkyoto.org/exohtml/Kepler-737.html. Retrieved May 18, 2016.
4. ↑ 4.0 4.1 4.2 4.3 4.4 "Kepler-737". https://simbad.u-strasbg.fr/simbad/sim-id?Ident=Kepler-737. Retrieved May 18, 2016.
5. ↑ 5.00 5.01 5.02 5.03 5.04 5.05 5.06 5.07 5.08 5.09 5.10 5.11 "Kepler-737's Documentary in NASA Exoplanet Archive". https://exoplanetarchive.ipac.caltech.edu/overview/Kepler-737#star_Kepler-737_collapsible. Retrieved May 18, 2016.
6. ↑ 6.0 6.1 6.2 "Planet beyond our solar system: Kepler-737b". https://exoplanets.nasa.gov/exoplanet-catalog/5111/kepler-737-b. Retrieved May 18, 2016.
7. ↑ "Tidally locked exoplanets may be more common than previously thought" (in en). https://www.washington.edu/news/2017/08/14/tidally-locked-exoplanets-may-be-more-common-than-previously-thought/.
8. ↑ Hammond, Mark; Lewis, Neil T. (2021-03-30). "The rotational and divergent components of atmospheric circulation on tidally locked planets" (in en). Proceedings of the National Academy of Sciences 118 (13): e2022705118. doi:10.1073/pnas.2022705118. ISSN 0027-8424. PMID 33753500. Bibcode: 2021PNAS..11822705H.
9. ↑ Sutter, Paul (2021-03-08). "Can super-rotating oceans cool off extreme exoplanets?" (in en). https://www.space.com/super-rotating-oceans-extreme-exoplanets.

* v
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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
* π1 (Azelfafage)
* π2
* ρ
* σ
* τ
* υ
* φ
* χ
* ψ
* ω1
* ω2
* P
* Q

|

Flamsteed|

* 2
* 4
* 8
* 9
* 14
* 15
* 16 (c)
* 17
* 20 (d)
* 22
* 23
* 26 (e)
* 27 (b1)
* 28 (b2)
* 29 (b3)
* 30
* 31
* 32
* 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
* RW
* SS
* TT
* BC
* BI
* CH
* KY
* V404
* V476
* V1057
* V1143
* V1191
* V1489
* V1500
* V1668
* V1974
* V2513

HR|

* 7633
* 7912
* 8193

HD|

* 185269
* 185435
* 187123
* 188753
* 191806

Gliese|

* 777
* 806
* 1245

Kepler|

* 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
* 66
* 67
* 68
* 69
* 70
* 78
* 80
* 84
* 86
* 89
* 107
* 182
* 186
* 223
* 371
* 419
* 432
* 451
* 452
* 1229
* 1520
* 1625

Other|

* AFGL 2591
* BD+40° 4210
* BD+43 3654
* Cygnus OB2 #8A
* Cygnus OB2 #12
* Cygnus X-1
* Cygnus X-3
* G 208-44
* G 208-45
* HAT-P-7
* HAT-P-11
* HAT-P-17
* KELT-9
* KIC 8462852
* KIC 9832227
* KIC 11026764
* KOI-74
* KOI-81
* KOI-256
* KPD 1930+2752
* MWC 349
* N6946-BH1
* NML Cygni
* PH1
* PSR J2032+4127
* W75N(B)-VLA2
* WISE J2000+3629
* WR 134
* WR 135
* WR 136
* WR 137
* WR 140
* WR 142
* WR 147
* WR 148

Former|

* 3

Star
clusters|

| Association|

* Cygnus OB2
* Cygnus OB7

|

Open|

* 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
* 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
* Cygnus A

* v
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* e

2016 in space

* « 2015

2017 »

Spacecraft launches|

* ExoMars Trace Gas Orbiter (Mars orbiter) / Schiaparelli EDM (Mars lander)
* Hitomi (X-ray observatory)
* OSIRIS-REx (mission to asteroid)

Selected NEOs|

* Asteroid close approaches
* 2013 TX68
* 252P/LINEAR
* 2016 EU85
* 469219 Kamoʻoalewa
* 2016 PQ
* P/2016 BA14

Planets|

| Extrasolar |

* HD 19467 b
* 2MASS J2126–8140
* BD+20 594b
* Pr0211 c
* TRAPPIST-1b
* TRAPPIST-1c
* TRAPPIST-1d
* KELT-9b
* Kepler-1229b
* Kepler-1520b
* Kepler-1638b
* Kepler-1647b
* Kepler-20g
* V830 Tauri b
* Qatar-3b
* Qatar-4b
* Qatar-5b
* K2-33b
* HIP 41378 b
* HIP 41378 c
* HIP 41378 d
* HIP 41378 e
* HIP 41378 f
* HD 131399 Ab
* HD 164922 c
* KELT-11b
* K2-72b
* K2-72c
* K2-72d
* K2-72e
* Proxima Centauri b
* 38 Virginis b
* TW Hydrae b
* OGLE-2007-BLG-349(AB)b
* Gliese 536 b

|

Solar|

* Planet Nine (hypothesized)

Rogue|

* 2MASS J1119–1137

Discoveries|

* BOSS Great Wall
* Crater 2
* GW150914 (first observation of gravitational waves, discovered in 2015)
* GW151226 (discovered in 2015)
* GN-z11
* GRB 160625B
* (471325) 2011 KT19
* Virgo I
* 1994 WR12 (recovered)

Comets|

* P/2016 BA14
* C/2016 R2 (PANSTARRS)

Space exploration|

* Juno (entered Jupiter orbit)
* Rosetta / Philae (end of mission to comet 67P)

* Category:2015 in space — Category:2016 in space — Category:2017 in space

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