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
Architecture
GJ 9827
GJ 9827
GJ 9827 b
GJ 9827 c
GJ 9827 d
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 GJ 9827 b GJ 9827 c GJ 9827 d
RA
23h27m05.23s
Dec
-01d17m07.24s
Distance
29.6610+0.0543-0.0541
pc
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
mV
10.37±0.03
mTESS
9.0684±0.0060
mJ
7.984±0.020
mH
7.379±0.042
mKs
7.193±0.024
mKep
10.277
mW1
---
mW2
---
mW3
---
mW4
---
mIc
---
mGaia
9.837730±0.000411
mB
11.588±0.034
mg
11.1637000±0.0005387
mi
13.1720000±0.0087852
mr
9.9025700±0.0003783
mu
14.7056000±0.0059104
mz
9.8503900±0.0012146
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
---
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
System
Star
Confirmed
Candidate
False Positive Planet
Controversial
False Positive
Aliases
Data Access
Transit Prediction Service
Time Series
Kepler | K2
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