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Ross 128 Overview

  • Star: Ross 128
    • Stellar Radius: 0.22 Solar Radius
    • Stellar Effective Temperature: 3135.00 K
    • Planet: Ross 128 b
      • Disposition Confirmed

Ross 128 Architecture & Discovery Information

Name Orbital Separation Planet Size Method Year Reference Disposition
Ross 128
Ross 128 b 9.87 d > 1.4 M⨁ Radial Velocity 2017 Bonfils et al. 2018 Confirmed Planet
Ross 128 b
  • Planet parameters drawn from Table 4 in ref. Planet equilibrium temperature value corresponds to albedo=0. (Bonfils et al. 2018)
RA
11h47m45.02s
Dec
+00d47m57.44s
Distance
3.374540±0.000805 pc
Parallax
296.307000±0.069922 mas
Ecliptic Latitude
-.48414 deg
Ecliptic Longitude
176.86846 deg
Galactic Latitude
59.55577 deg
Galactic Longitude
270.15662 deg
Total Proper Motion
1365.9371779±0.0925812 mas/yr
Proper Motion (RA)
607.678000±0.136884 mas/yr
Proper Motion (Dec)
-1223.3200000±0.0778638 mas/yr
Photometry
mV 11.12±0.10
mTESS 8.2432700±0.0074268
mJ 6.505±0.023
mH 5.945±0.024
mKs 5.654±0.024
mKep 9.778
mIc ---
mGaia 9.59067±0.00112
mB ---
Abundances
(Hypatia Catalog)
[Fe/H] -0.06±0.04 dex
[Mg/H] -0.11±0.07 dex
[Si/H] 0.02±0.05 dex
Mission
K2: Observed in Campaign 1
Tools
Planetary Systems
ExoFOP Target Overview Page
IRSA Finding Chart
K2 Targets
Stellar Hosts
K2 Time Series
Source TICv8 Gaia DR2 Bonfils et al. 2018 Turnbull 2015 Nidever et al. 2002 Hawley et al. 1996
Teff
(K)
3163.0±157.0
3305.0000+132.2230-9.3333
 3192±60 3135 --- ---
M✶
(M⦿)
0.1786010±0.0200999 --- 0.168±0.017 0.25 --- ---
R✶
(R⦿)
0.2096280±0.0063757 --- 0.1967±0.0077 0.22 --- ---
Sp. T
--- --- M4 M4.0V --- M4
L✶
(log10(L⦿))
-2.4020+0.1007-0.1313
 ---
-2.44+0.04-0.05
 --- --- ---
Metallicity
(dex)
--- --- -0.02±0.08 [M/H] --- --- ---
γ
(km/s)
--- --- -30.89946±0.00058 --- -31.1 ---
Age
(Gyr)
--- --- >5 --- --- ---
Prot
(days)
--- --- 123 --- --- ---
ρ✶
(g/cm3)
27.3338533±0.5915504 --- --- --- --- ---
log g
(log10(cm/s2))
5.047050±0.022658 --- --- --- --- ---
Print
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Planetary Systems
Source Bonfils et al. 2018
Teq
(K)
301
S
(S⨁)
1.38
Mp sin i
(M⨁)
1.40±0.21
Mp sin i
(MJup)
0.00440±0.00066
e
0.116±0.097
P
(days)
9.8658±0.0070
K
(m/s)
1.39±0.18
a
(au)
0.0496±0.0017
Print
Literature Stellar Spectra (3 Files)
File Type Spectrum Type Wavelength Category Reference
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Literature Time Series (1 File Type, 1 File)
File Type Data Points Filter Reference
Photometric Light Curve     58 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Known Objects
1 Confirmed Planets
1 K2 Targets
2 2MASS Point Source Catalog
Data Files
1 K2 Time Series
1 Associated Literature Data
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  • Candidate
  • False Positive Planet
  • Controversial
  • False Positive
  • Aliases
  • Data Access
  • Transit Prediction Service
  • Time Series
  • Kepler | K2
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