GJ 9827 Overview
GJ 9827
0.60
R⦿
4305.00
K
GJ 9827 b
0.128
RJup
GJ 9827 c
0.101
RJup
GJ 9827 d
0.169
RJup
- Other Data
- Bibliography 18
- Exoplanet Archive Notes 4
- Nearby Data 5
Discovery Data
Host | Planet | Method | Year | Reference | Disposition |
---|---|---|---|---|---|
GJ 9827 | GJ 9827 b | Transit | 2017 | Niraula et al. 2017 | Confirmed Planet |
GJ 9827 | GJ 9827 c | Transit | 2017 | Niraula et al. 2017 | Confirmed Planet |
GJ 9827 | GJ 9827 d | Transit | 2017 | Niraula et al. 2017 | Confirmed Planet |
GJ 9827
- Rotation period uncertainty calculated as average from asymmetric uncertainties. (Niraula et al. 2017)
- Planet also independently announced in this ref. (Rodriguez et al. 2018)
- Planet also independently announced in this ref. (Rodriguez et al. 2018)
- Planet also independently announced in this ref. (Rodriguez et al. 2018)
- RA
- 23h27m05.23s
- Dec
- -01d17m07.24s
- Distance
-
29.6610+0.0543-0.0541pc
- Parallax
- 33.6855000±0.0611343 mas
- Ecliptic Latitude
- 2.08221 deg
- Ecliptic Longitude
- 351.93155 deg
- Galactic Latitude
- -57.18299 deg
- Galactic Longitude
- 81.34803 deg
- Total Proper Motion
- 433.6784124±0.0891140 mas/yr
- Proper Motion (RA)
- 376.0190000±0.0944988 mas/yr
- Proper Motion (Dec)
- 216.0710000±0.0703346 mas/yr
- Photometry
-
mV10.37±0.03
-
mTESS9.0684±0.0060
-
mJ7.984±0.020
-
mH7.379±0.042
-
mKs7.193±0.024
-
mKep10.277
-
mW1---
-
mW2---
-
mW3---
-
mW4---
-
mIc---
-
mGaia9.837730±0.000411
-
mB11.588±0.034
-
mg11.1637000±0.0005387
-
mi13.1720000±0.0087852
-
mr9.9025700±0.0003783
-
mu14.7056000±0.0059104
-
mz9.8503900±0.0012146
-
Mission
- K2 : Observed in Campaign 12
Source | Passegger et al. 2024 | Bonomo et al. 2023 | TICv8 | Dai et al. 2019 | Rice et al. 2019 | Prieto-Arranz et al. 2018 | Gaia DR2 | Rodriguez et al. 2018 | Niraula et al. 2017 | Hawley et al. 1996 | ExoFOP-TESS TOI | Show Candidate Solutions >> | << Hide Candidate Solutions |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Teff
(K)
|
4236±12 | 4305±49 |
4199.000+123.026-131.362
|
4255±110 |
4340+40-53
|
4219±70 |
4173.5435+296.5170-67.1335
|
4269+98-99
|
4255±110 | --- | 4199.000±127.194 | ||
Metallicity
(dex)
|
-0.29±0.03 [Fe/H] | -0.26±0.09 [Fe/H] | --- | -0.28±0.12 [Fe/H] | -0.26±0.09 [M/H] | -0.29±0.12 [Fe/H] | --- | -0.5±0.1 [M/H] | -0.28±0.12 [Fe/H] | --- | --- | ||
Age
(Gyr)
|
5.465±4.058 |
10+3-5
|
--- | --- | 10 | --- | --- | --- | --- | --- | --- | ||
M✶
(M⦿)
|
0.62±0.04 |
0.606+0.015-0.014
|
0.6600000+0.0682165-0.0982891
|
0.606+0.020-0.015
|
0.606+0.020-0.014
|
0.637±0.051 | --- |
0.614+0.030-0.029
|
0.659±0.060 | --- | --- | ||
R✶
(R⦿)
|
0.58±0.03 |
0.602+0.005-0.004
|
0.6341630+0.0711925-0.0497724
|
0.5994+0.0081-0.0085
|
0.602+0.005-0.004
|
0.622±0.051 |
0.6469711+0.0213268-0.0829855
|
0.613+0.033-0.034
|
0.651±0.065 | --- | 0.63±0.06 | ||
Prot
(days)
|
28.16+3.38-2.66
|
28.90+1.09-0.70
|
--- | --- | 28.72±0.19 | --- | --- | --- | 16.9±1.8 | --- | --- | ||
v sin i
(km/s)
|
<1.75 | --- | --- | --- | <2 | 1.5±1.0 | --- | 1.3±1.5 | 2±1 | --- | --- | ||
CAII LOG RHK
|
-5.28±0.05 | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ||
log g
(log10(cm/s2))
|
4.719±0.013 | --- |
4.653210+0.138511-0.083781
|
4.70±0.15 |
4.660+0.015-0.010
|
4.657±0.042 | --- |
4.651+0.055-0.050
|
4.70±0.15 | --- | 4.653210±0.111146 | ||
Sp. T
|
K7 V | --- | --- | --- | --- | K6 V | --- | K5 V | K6 V | K5 | --- | ||
L✶
(log10(L⦿))
|
--- | --- |
-0.9483205+0.0364101-0.0215994
|
--- | --- | --- |
-0.94151578+0.00104421-0.00104669
|
--- | --- | --- | --- | ||
ρ✶
(g/cm3)
|
--- | --- |
3.6484472+1.5527686-0.8709977
|
3.97+0.20-0.15
|
--- | --- | --- |
3.76+0.75-0.57
|
--- | --- | --- | ||
γ
(km/s)
|
--- | --- | --- | --- | --- |
31.94888+0.00035-0.00034
|
--- | --- | --- | --- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
Source | Passegger et al. 2024 | Bonomo et al. 2023 | Kokori et al. 2023 | Dai et al. 2019 | Rice et al. 2019 | Prieto-Arranz et al. 2018 | Rodriguez et al. 2018 | Niraula et al. 2017 | ExoFOP-TESS TOI | Show Candidate Solutions >> | << Hide Candidate Solutions |
---|---|---|---|---|---|---|---|---|---|---|---|
Teq
(K)
|
1035.01±29.07 | 1175±14 | --- | --- | --- |
1114+46-26
|
1172±43 |
1043.5+36.2-31.3
|
1183 | ||
S
(S⨁)
|
--- | 318±16 | --- | --- | --- |
256+44-23
|
315+48-44
|
--- | 325.749 | ||
P
(days)
|
1.208974±0.000001 | 1.2089819±0.0000071 | 1.2089749±0.0000010 | 1.209 |
1.20898190+0.00000693-0.00000714
|
1.208966±0.000012 |
1.2089802+0.0000084-0.0000081
|
1.208957+0.000013-0.000012
|
1.2089755±0.0000003 | ||
Rp
(R⨁)
|
1.44+0.09-0.07
|
1.577+0.027-0.031
|
--- |
1.571+0.033-0.039
|
1.577+0.027-0.031
|
1.58+0.14-0.13
|
1.62±0.11 |
1.75+0.11-0.12
|
1.686450±0.164422 | ||
Rp
(RJup)
|
0.128+0.008-0.006
|
0.1407+0.0024-0.0028
|
--- |
0.1402+0.0029-0.0035
|
0.1407+0.0024-0.0028
|
0.141+0.012-0.012
|
0.145±0.010 |
0.156+0.010-0.011
|
0.1504553±0.0146688 | ||
δ
(%)
|
--- | --- | --- | --- | --- | --- |
0.0586+0.0019-0.0023
|
--- | 0.06680000±0.00236472 | ||
T14
(hours)
|
--- | --- | --- | --- |
1.265+0.022-0.020
|
1.281±0.020 |
1.260+0.018-0.017
|
1.630+0.085-0.079
|
1.286±0.135 | ||
TC
(days)
|
--- | 2457738.82586±0.00026 | 2457831.91720±0.00026 | --- | 2457738.82586±0.00026 |
2457738.82646+0.00044-0.00042
|
2457738.82588+0.00030-0.00031
|
2457738.82671+0.00044-0.00047
|
2460231.7338310±0.0006433 | ||
a/R✶
|
--- | --- |
6.72+0.08-0.09
|
--- |
6.719+0.080-0.086
|
7.23+0.19-0.55
|
6.62+0.41-0.35
|
6.68+0.42-0.44
|
--- | ||
i
(deg)
|
87.60+1.31-1.27
|
86.07+0.41-0.34
|
86.1+0.4-0.3
|
--- |
86.07+0.41-0.34
|
88.33+1.15-2.10
|
85.73+1.20-0.96
|
85.08+1.08-1.05
|
--- | ||
Rp/R✶
|
--- | --- | 0.0240±0.0004 |
0.02401+0.00038-0.00049
|
0.02396+0.00037-0.00044
|
0.02322+0.00058-0.00037
|
0.02420+0.00040-0.00047
|
0.0246+0.0004-0.0006
|
--- | ||
b
|
0.30+0.14-0.16
|
--- | --- | --- |
0.4602+0.0352-0.0443
|
0.21+0.23-0.14
|
0.493+0.080-0.120
|
0.57±0.13 | --- | ||
Mp
(M⨁)
|
4.28+0.35-0.33
|
5.14±0.47 | --- |
4.89+0.43-0.42
|
4.91±0.49 |
3.69+0.48-0.46
|
3.42+1.20-0.76
|
--- | --- | ||
Mp
(MJup)
|
0.0135+0.0011-0.0010
|
0.0162±0.0015 | --- |
0.0154+0.0014-0.0013
|
0.0154±0.0015 |
0.0116+0.0015-0.0014
|
0.0108+0.0038-0.0024
|
--- | --- | ||
ρ
(g/cm3)
|
7.858±1.467 |
7.19+0.81-0.76
|
--- |
6.9+1.0-1.1
|
6.93+0.82-0.76
|
5.11+1.74-1.27
|
4.50+1.50-0.98
|
--- | --- | ||
K
(m/s)
|
3.53±0.22 | 4.31±0.39 | --- |
4.10+0.35-0.34
|
4.11±0.40 | 3.00±0.35 |
2.84+0.97-0.64
|
--- | --- | ||
a
(au)
|
0.0189±0.0004 | 0.01880±0.00016 | --- | --- |
0.01880+0.00020-0.00014
|
0.0206+0.0020-0.0023
|
0.01888+0.00030-0.00031
|
0.020±0.002 | --- | ||
e
|
--- | <0.063 | --- | --- | 0 | --- | --- | --- | --- | ||
Tp
(days)
|
2457738.8259±0.0005 | --- | --- | --- | --- | --- |
2457738.82588+0.00030-0.00031
|
--- | --- | ||
Mp sin i
(M⨁)
|
--- | --- | --- | --- | --- | --- |
3.41+1.20-0.76
|
--- | --- | ||
Mp sin i
(MJup)
|
--- | --- | --- | --- | --- | --- |
0.0107+0.0038-0.0024
|
--- | --- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
Source | Passegger et al. 2024 | Bonomo et al. 2023 | Kokori et al. 2023 | Rice et al. 2019 | Prieto-Arranz et al. 2018 | Rodriguez et al. 2018 | Niraula et al. 2017 |
---|---|---|---|---|---|---|---|
a/R✶
|
--- | --- | 14.04±0.17 |
14.035+0.172-0.171
|
15.10+0.39-1.14
|
13.83+0.86-0.74
|
13.96+0.87-0.92
|
i
(deg)
|
89.09+0.60-0.68
|
88.19+0.21-0.18
|
88.19+0.21-0.18
|
88.19+0.21-0.18
|
89.07+0.59-0.92
|
88.05+0.64-0.48
|
87.81+0.57-0.54
|
P
(days)
|
3.648103+0.000013-0.000010
|
3.648096±0.000063 | 3.6481145±0.0000096 |
3.6480957+0.0000633-0.0000621
|
3.64823±0.00012 |
3.648083+0.000060-0.000058
|
3.64802±0.00011 |
Rp/R✶
|
--- | --- | 0.01887±0.00034 |
0.01887+0.00034-0.00037
|
0.01820+0.00054-0.00041
|
0.01899+0.00034-0.00037
|
0.0192+0.0004-0.0005
|
TC
(days)
|
--- | 2457742.19930±0.00073 | 2457851.64378±0.00075 |
2457742.19930+0.00072-0.00073
|
2457738.5496±0.0015 |
2457742.19944+0.00063-0.00068
|
2457738.55194+0.00138-0.00137
|
Teq
(K)
|
715.94±20.33 | 813±10 | --- | --- |
771+31-18
|
811±30 |
721.9+25.0-21.5
|
b
|
0.23+0.17-0.15
|
--- | --- |
0.4428+0.0415-0.0483
|
0.25+0.21-0.16
|
0.469+0.085-0.130
|
0.53±0.14 |
S
(S⨁)
|
--- | 73.0±3.7 | --- | --- |
59+10-5
|
72+11-10
|
--- |
Mp
(M⨁)
|
1.86+0.37-0.39
|
<1.3 | --- | 0.84 |
1.45+0.58-0.57
|
2.42+0.75-0.49
|
--- |
Mp
(MJup)
|
0.00585+0.00116-0.00123
|
<0.0041 | --- | 0.0026 |
0.00456+0.00182-0.00179
|
0.00761+0.00236-0.00154
|
--- |
ρ
(g/cm3)
|
7.142±1.857 | <3.7 | --- | 2.42 |
4.13+2.31-1.77
|
6.4+2.0-1.1
|
--- |
Rp
(R⨁)
|
1.13+0.07-0.05
|
1.241+0.024-0.026
|
--- |
1.241+0.024-0.026
|
1.24±0.11 |
1.269+0.087-0.089
|
1.36±0.09 |
Rp
(RJup)
|
0.101+0.006-0.004
|
0.1107+0.0021-0.0023
|
--- |
0.1107+0.0021-0.0023
|
0.111±0.010 |
0.1132+0.0078-0.0079
|
0.121±0.008 |
K
(m/s)
|
1.06±0.21 | <0.75 | --- | 0.49 | 0.820±0.320 |
1.39+0.44-0.29
|
--- |
a
(au)
|
0.0395±0.0009 | 0.03925±0.00033 | --- |
0.03925+0.00042-0.00029
|
0.0429+0.0042-0.0048
|
0.03942+0.00062-0.00064
|
0.042±0.003 |
T14
(hours)
|
--- | --- | --- | 1.825±0.037 | 1.825±0.042 | 1.83±0.03 |
2.190+0.031-0.038
|
e
|
--- | <0.094 | --- | 0 | --- | --- | --- |
Tp
(days)
|
2457742.2000±0.0014 | --- | --- | --- | --- |
2457742.19944+0.00063-0.00068
|
--- |
Mp sin i
(M⨁)
|
--- | --- | --- | --- | --- |
2.42+0.75-0.49
|
--- |
Mp sin i
(MJup)
|
--- | --- | --- | --- | --- |
0.00761+0.00236-0.00154
|
--- |
δ
(%)
|
--- | --- | --- | --- | --- |
0.0361+0.0013-0.0014
|
--- |
- Status
- Confirmed Planet
- Detected By
- Radial Velocity, Transit
Source | Passegger et al. 2024 | Bonomo et al. 2023 | Rice et al. 2019 | Prieto-Arranz et al. 2018 | Rodriguez et al. 2018 | Niraula et al. 2017 |
---|---|---|---|---|---|---|
a/R✶
|
--- | --- |
20.003+0.230-0.254
|
21.51+0.56-1.63
|
19.7+1.2-1.0
|
19.88+1.24-1.30
|
Teq
(K)
|
599.68±16.86 | 681±8 | --- |
646+26-15
|
680±25 |
604.9+20.8-18.0
|
b
|
0.85+0.02-0.03
|
--- |
0.8927+0.0071-0.0090
|
0.864+0.022-0.013
|
0.896+0.012-0.016
|
0.91±0.09 |
S
(S⨁)
|
--- | 36.0±1.9 | --- |
29+5-3
|
35.6+5.4-5.0
|
--- |
Mp
(M⨁)
|
3.02+0.58-0.57
|
3.53+0.87-0.88
|
4.04+0.82-0.84
|
2.35+0.70-0.68
|
5.2+1.8-1.2
|
--- |
Mp
(MJup)
|
0.00950+0.00182-0.00179
|
0.0111+0.0027-0.0028
|
0.0127+0.0026-0.0026
|
0.00739+0.00220-0.00214
|
0.016+0.006-0.004
|
--- |
i
(deg)
|
87.66+0.13-0.16
|
87.443±0.045 | 87.443±0.045 |
87.70+0.08-0.25
|
87.39+0.20-0.18
|
87.39+0.20-0.23
|
P
(days)
|
6.201812±0.000009 | 6.201470±0.000063 |
6.2014698+0.0000626-0.0000611
|
6.20142±0.00013 |
6.201467+0.000062-0.000061
|
6.20141+0.00013-0.00010
|
ρ
(g/cm3)
|
2.454±0.739 |
2.34+0.62-0.59
|
2.69+0.58-0.57
|
1.51+0.71-0.53
|
3.23+1.10-0.72
|
--- |
Rp
(R⨁)
|
1.89+0.16-0.14
|
2.022+0.046-0.043
|
2.022+0.046-0.043
|
2.04±0.18 | 2.07±0.14 | 2.10±0.15 |
Rp
(RJup)
|
0.169+0.014-0.012
|
0.1804+0.0041-0.0038
|
0.1804+0.0041-0.0038
|
0.182±0.016 | 0.185±0.012 | 0.187±0.013 |
Rp/R✶
|
--- | --- |
0.03073+0.00065-0.00060
|
0.02993+0.00101-0.00078
|
0.03093+0.00065-0.00059
|
0.0295+0.0011-0.0009
|
K
(m/s)
|
1.44±0.27 | 1.73±0.43 | 1.97±0.40 | 1.11±0.32 |
2.50+0.86-0.58
|
--- |
a
(au)
|
0.0563±0.0012 | 0.05590±0.00046 |
0.05591+0.00059-0.00041
|
0.0611+0.0060-0.0068
|
0.05615+0.00089-0.00091
|
0.060±0.005 |
T14
(hours)
|
--- | --- |
1.223+0.035-0.029
|
1.248+0.038-0.033
|
1.23+0.03-0.02
|
1.600+0.065-0.078
|
TC
(days)
|
--- | 2457740.96115±0.00045 |
2457740.96115+0.00044-0.00045
|
2457740.96198+0.00084-0.00086
|
2457740.96110±0.00044 |
2457740.96099+0.00082-0.00085
|
e
|
--- | <0.13 | 0 | --- | --- | --- |
Tp
(days)
|
2457740.9588+0.0008-0.0009
|
--- | --- | --- | 2457740.96110±0.00044 | --- |
Mp sin i
(M⨁)
|
--- | --- | --- | --- |
5.2+1.8-1.2
|
--- |
Mp sin i
(MJup)
|
--- | --- | --- | --- |
0.016+0.006-0.004
|
--- |
δ
(%)
|
--- | --- | --- | --- |
0.0957+0.0041-0.0036
|
--- |
Literature Time Series
(1 File Type, 1 File)
File Type | Data Points | Filter | Reference |
---|---|---|---|
Photometric Light Curve | 74 | Hp (Hipparcos) | Hipparcos and Tycho Catalogs |
- Known Objects
- 3 Confirmed Planets
- 1 K2 Targets
- 1 2MASS Point Source Catalog
- Data Files
- 1 K2 Time Series
- 3 Associated Literature Data
-
The compact multi-planet system GJ 9827 revisited with ESPRESSO
Passegger et al. 2024 | Reference Overview -
Cold Jupiters and improved masses in 38 Kepler and K2 small-planet systems from 3661 high-precision HARPS-N radial velocities. No excess of cold Jupiters in small-planet systems
Bonomo et al. 2023 | Reference Overview -
ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations
Kokori et al. 2023 | Reference Overview -
The Revised TESS Input Catalog and Candidate Target List
TICv8 | Reference Overview -
Homogeneous Analysis of Hot Earths: Masses, Sizes, and Compositions
Dai et al. 2019 | Reference Overview -
Masses and radii for the three super-Earths orbiting GJ 9827, and implications for the composition of small exoplanets
Rice et al. 2019 | Reference Overview -
Mass determination of the 1:3:5 near-resonant planets transiting GJ 9827 (K2-135)
Prieto-Arranz et al. 2018 | Reference Overview -
Gaia Data Release 2
Gaia DR2 | Reference Overview -
A System of Three Super Earths Transiting the Late K-Dwarf GJ 9827 at 30 pc
Rodriguez et al. 2018 | Reference Overview -
Three Super-Earths Transiting the Nearby Star GJ 9827
Niraula et al. 2017 | Reference Overview -
ExoFOP-TESS TOI Table
ExoFOP-TESS TOI -
The K2 Ecliptic Plane Input Catalog (EPIC) and Stellar Classifications of 138,600 Targets in Campaigns 1-8
EPIC Catalog | Reference Overview -
All WISE Data Release
Cutri et al. 2014 | Reference Overview -
Validation of the new Hipparcos reduction
van Leeuwen et al. 2007 | Reference Overview -
2MASS All-Sky Catalog of Point Sources
2MASS Point Source Catalog | Reference Overview -
The Hipparcos and Tycho Catalogs
Hipparcos and Tycho Catalogs | Reference Overview -
The Palomar/MSU nearby star spectroscopic survey. II. The southern M dwarfs and investigations of magnetic activity.
Hawley et al. 1996 | Reference Overview -
UBV(RI)_c photometry of faint nearby stars
Laing 1989 | Reference Overview
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