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gam Cep Overview

  • Star: gam Cep B
  • Star: gam Cep
    • Stellar Radius: 4.66 Solar Radius
    • Stellar Effective Temperature: 4888.00 K
    • Planet: gam Cep b
      • Disposition Confirmed

gam Cep Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
gam Cep B
gam Cep
gam Cep b 904 d > 514.88 M⨁ Radial Velocity 2003 Hatzes et al. 2003 Confirmed Planet
gam Cep
  • This reference contains discussion regarding the stellar multiplicity of this system. (Hatzes et al. 2003)
gam Cep b
  • Typo in published time of periastron in Table 6. Literature Value: 253121.925. Exoplanet Archive Value: 2453121.925. (Hatzes et al. 2003)
RA
---
Dec
---
Distance
---
Parallax
---
Ecliptic Latitude
---
Ecliptic Longitude
---
Galactic Latitude
---
Galactic Longitude
---
Total Proper Motion
---
Proper Motion (RA)
---
Proper Motion (Dec)
---
Photometry
mV ---
mTESS ---
mJ ---
mH ---
mKs ---
mW1 ---
mW2 ---
mW3 ---
mW4 ---
mGaia ---
mB ---
Tools
Planetary Systems
Stellar Hosts
Source Van Zandt et al. 2026 Knudstrup et al. 2023 Neuhäuser et al. 2007
M✶
(M⦿)
0.396±0.002
0.328+0.009-0.012
 0.409±0.018
Sp. T
--- --- M4 V
Print
RA
23h39m20.60s
Dec
+77d37m59.16s
Distance
14.1024000±0.0989298 pc
Parallax
70.91±0.40 mas
Ecliptic Latitude
64.67033 deg
Ecliptic Longitude
60.0906 deg
Galactic Latitude
15.31627 deg
Galactic Longitude
118.99221 deg
Total Proper Motion
136.1249426±8.0000000 mas/yr
Proper Motion (RA)
-49.0±8.0 mas/yr
Proper Motion (Dec)
127.0±8.0 mas/yr
Photometry
mV 3.23006±0.02300
mTESS 2.2213±1.4843
mJ 1.661±0.348
mH 1.190±0.176
mKs 1.038±0.206
mW1 -1.808
mW2 -1.126
mW3 0.900±0.058
mW4 0.839±0.017
mGaia 2.9262700±0.0056611
mB 4.247±0.017
Abundances
(Hypatia Catalog)
[Fe/H] 0.18±0.12 dex
[C/H] 0.15±0.08 dex
[O/H] 0.19±0.08 dex
[Na/H] 0.26±0.08 dex
[Mg/H] 0.27±0.22 dex
[Al/H] 0.30±0.02 dex
[Si/H] 0.26±0.16 dex
[Ca/H] 0.13±0.19 dex
[Y/H] 0.03±0.24 dex
[BaII/H] 0.08±0.34 dex
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
Stellar Hosts
Source Van Zandt et al. 2026 Knudstrup et al. 2023 TICv8 Gaia DR2 Benedict et al. 2018 Turnbull 2015 Mortier et al. 2013 Endl et al. 2011 Sanz-Forcada et al. 2010 Baines et al. 2009 Neuhäuser et al. 2007 Hatzes et al. 2003 Gray et al. 2003 Garrison & Beattie 1998 Duncan et al. 1991 Cannon & Pickering 1918
Teff
(K)
---
4775+33-31
 4833.6100±23.7918
4707.25+1397.50-819.75
 --- 4761 4764±112 --- --- 4744±21 --- 4888 --- --- --- ---
Metallicity
(dex)
0.20±0.07 [Fe/H] 0.18±0.06 [Fe/H] 0.0488777±0.0298914 [M/H] --- --- --- 0.13±0.06 [Fe/H] --- --- 0.08±0.11 [Fe/H] --- 0.18 [Fe/H] --- --- --- ---
v sin i
(km/s)
--- 0±1 --- --- --- --- --- --- --- --- --- 1.5±1.0 --- --- --- ---
M✶
(M⦿)
1.26±0.01
1.27+0.05-0.07
 --- --- 1.18 1.88 1.26±0.14 1.4±0.12 --- 1.2±0.1 1.40±0.12 1.59±0.12 --- --- --- ---
R✶
(R⦿)
---
4.74+0.07-0.08
 --- --- --- 5.05 --- 4.9 --- 5.0±0.2 --- 4.66 --- --- --- ---
log g
(log10(cm/s2))
---
3.189+0.007-0.008
 --- --- --- 3.21 3.10±0.27 --- --- --- --- 3.33 --- --- --- ---
Sp. T
--- K1 III-IV --- --- --- K1IV --- --- --- K1 IV --- K1 IV K1 III K1 III-IV --- K0
Age
(Gyr)
---
5.7+0.8-0.9
 --- --- --- --- --- --- 4.08 5.4±2.1 --- --- --- --- --- ---
L✶
(log10(L⦿))
--- --- --- --- --- 1.073±0.004 --- --- --- --- --- --- --- --- --- ---
γ
(km/s)
-43.668±0.029 --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
S Index
--- --- --- --- --- --- --- --- --- --- --- --- --- --- 0.1237 ---
Print
Status
Confirmed Planet
Detected By
Astrometry, Radial Velocity
Tools
Planetary Systems
Source Van Zandt et al. 2026 Knudstrup et al. 2023 Benedict et al. 2018 Endl et al. 2011 Neuhäuser et al. 2007 Hatzes et al. 2003
Tp
(days)
2455980+46-50
(BJD)
--- 2453248.1
(JD)
2453227±87 2453147±71
(HJD)
2453121.925±66.900
ω
(deg)
295±20
49+6-7
 86 94.6±34.6 63±27 49.6±25.6
Mp sin i
(M⨁)
515±13 448±25 --- 587.96±50.85 509±41 540.3±127.1
Mp sin i
(MJup)
1.62±0.04 1.41±0.08 --- 1.85±0.16 1.60±0.13 1.7±0.4
e
0.07±0.03
0.15+0.07-0.05
 0.08 0.049±0.034 0.115±0.058 0.12±0.05
P
(days)
904.0±0.7 913±3 905.0 903.3±1.5 902.9±3.5 905.574±3.08
K
(m/s)
--- 25.6±1.3 32.4 31.1±0.97 27.0±1.5 27.50±1.5
a
(au)
1.978±0.007 --- --- 2.05±0.06 2.044±0.057 2.13±0.05
Mp
(M⨁)
---
2098+731-890
2988+222-350
 --- --- ---
Mp
(MJup)
---
6.6+2.3-2.8
9.40+0.70-1.10
 --- --- ---
i
(deg)
90±40 --- --- --- --- ---
TC
(days)
---
2453117+18-16
(JD)
--- --- --- ---
Print
Literature Stellar Spectra (2 Files)
File Type Spectrum Type Wavelength Category Reference
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Literature Time Series (2 File Types, 13 Files)
File Type Data Points Filter Reference
Photometric Light Curve     131 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Radial Velocity Curve     3 Optical Spectra Torres 2007
Radial Velocity Curve     49 Optical Spectra Hatzes et al. 2003
Radial Velocity Curve     43 Optical Spectra Hatzes et al. 2003
Radial Velocity Curve     39 Optical Spectra Hatzes et al. 2003
Radial Velocity Curve     33 Optical Spectra Griffin et al. 2002
Radial Velocity Curve     29 Optical Spectra Griffin et al. 2002
Radial Velocity Curve     11 Optical Spectra Griffin et al. 2002
Radial Velocity Curve     7 Optical Spectra Griffin et al. 2002
Radial Velocity Curve     5 Optical Spectra Griffin et al. 2002
Radial Velocity Curve     3 Optical Spectra Griffin et al. 2002
Radial Velocity Curve     69 Optical Spectra Walker et al. 1992
Radial Velocity Curve     26 Optical Spectra Campbell et al. 1988
Known Objects
1 Confirmed Planets
1 2MASS Point Source Catalog
Data Files
1 Associated Literature Data
Known Objects
1 Confirmed Planets
1 2MASS Point Source Catalog
Data Files
1 Associated Literature Data
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