55 Cnc Overview

55 Cnc B 0.29 R⦿ 3187.00 K
55 Cnc 0.93 R⦿ 5200.00 K
55 Cnc e
0.167 RJup
55 Cnc b
55 Cnc c
55 Cnc f
55 Cnc d
Discovery Data
Host Planet Method Year Reference Disposition
55 Cnc 55 Cnc e Radial Velocity 2004 McArthur et al. 2004 Confirmed Planet
55 Cnc 55 Cnc b Radial Velocity 1996 Butler et al. 1997 Confirmed Planet
55 Cnc 55 Cnc c Radial Velocity 2004 McArthur et al. 2004 Confirmed Planet
55 Cnc 55 Cnc f Radial Velocity 2007 Fischer et al. 2008 Confirmed Planet
55 Cnc 55 Cnc d Radial Velocity 2002 Marcy et al. 2002 Confirmed Planet
55 Cnc
  • This reference contains discussion regarding the stellar multiplicity of this system. (Mugrauer et al. 2006)
  • This reference contains discussion regarding the stellar multiplicity of this system. (Mugrauer 2019)
55 Cnc
  • Some stellar parameter values may be biased due to companion blend (WDS Catalog)
  • Stellar rotation period and age value/uncertainties estimated from range given in ref. (Marcy et al. 2002)
55 Cnc e
RA
08h52m40.30s
Dec
+28d18m55.03s
Distance
12.4773±0.0171 pc
Parallax
80.116600±0.108962 mas
Ecliptic Latitude
10.35672 deg
Ecliptic Longitude
127.7529 deg
Galactic Latitude
37.71118 deg
Galactic Longitude
196.81868 deg
Total Proper Motion
539.8833656±0.1428690 mas/yr
Proper Motion (RA)
-481.204000±0.150965 mas/yr
Proper Motion (Dec)
-244.779000±0.105915 mas/yr
Photometry
mV
13.152±0.090
mTESS
10.3334000±0.0073243
mJ
8.560±0.027
mH
7.933±0.040
mKs
7.666±0.023
mW1
---
mW2
---
mW3
---
mW4
---
mGaia
11.679800±0.000884
mB
14.884±0.088
Source TICv8
Teff
(K)
3187.0±157.0
L
(log10(L⦿))
-2.1081+0.1000-0.1302
ρ
(g/cm3)
15.3679526±0.2185527
M
(M⦿)
0.2648230±0.0202096
R
(R⦿)
0.2896240±0.0087541
log g
(log10(cm/s2))
4.9373500±0.0069453
RA
08h52m35.24s
Dec
+28d19m47.34s
Distance
12.5855+0.0124-0.0123
pc
Parallax
79.4274000±0.0776646 mas
Ecliptic Latitude
10.36555 deg
Ecliptic Longitude
127.73069 deg
Galactic Latitude
37.69663 deg
Galactic Longitude
196.79526 deg
Total Proper Motion
539.1329986±0.1295797 mas/yr
Proper Motion (RA)
-485.872000±0.133857 mas/yr
Proper Motion (Dec)
-233.651000±0.109171 mas/yr
Photometry
mV
5.95084±0.02300
mTESS
5.2058±0.0061
mJ
4.768±0.244
mH
4.265±0.234
mKs
4.015±0.036
mW1
4.001±0.318
mW2
3.296±0.174
mW3
4.051±0.015
mW4
4.014±0.030
mGaia
5.7297300±0.0008523
mB
6.816±0.019
Source TICv8 Dai et al. 2019 Bourrier et al. 2018 Gaia DR2 Turnbull 2015 Maldonado et al. 2015 Salz et al. 2015 Baluev 2015 Bourrier & Hébrard 2014 von Braun et al. 2011 Demory et al. 2011 Winn et al. 2011 Takeda et al. 2007 Valenti & Fischer 2005 McArthur et al. 2004 Wright et al. 2004 Naef et al. 2004 Gray et al. 2003 Santos et al. 2003 Marcy et al. 2002 Nidever et al. 2002 Butler et al. 1997 Cannon & Pickering 1918
S Index
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 0.165±0.021 --- --- --- --- --- --- ---
CAII LOG RHK
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- -5.04 --- --- --- --- --- --- ---
Metallicity
(dex)
0.35±0.10 [M/H] 0.35±0.10 [Fe/H] 0.35±0.10 [Fe/H] --- 0.31 [Fe/H] 0.42±0.03 [Fe/H] --- --- --- 0.31±0.04 [Fe/H] 0.31±0.04 [Fe/H] --- --- --- --- --- --- --- 0.35 [Fe/H] 0.27 [Fe/H] --- 0.23 [Fe/H] ---
Age
(Gyr)
--- --- --- --- 9.5 --- --- --- --- 10.2±2.5 --- --- >7.24 --- --- --- --- --- --- 5.5±2.5 --- 5 ---
M
(M⦿)
0.9000000+0.1400420-0.0899928
0.873+0.051-0.035
0.905±0.015 --- 0.96 --- --- 0.95 --- 0.905±0.015 0.905±0.015
0.963 +0.051-0.029
0.9630+0.0510-0.0290
--- 0.950±0.080 --- --- --- 0.88 0.95 --- 0.85 ---
Sp. T
--- --- --- --- G8V --- K0 IV-V --- --- K0 IV-V --- G8 V --- --- --- --- --- K0 IV-V --- G8 V --- G8 V K0
Prot
(days)
--- --- 38.80±0.05 --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- 38.5±3.5 --- 44 ---
R
(R⦿)
0.96351500+0.07773920-0.05315530
0.954+0.017-0.018
0.943±0.010
0.94637810+0.05677990-0.08044800
0.93 --- --- --- --- 0.943±0.010 0.943±0.010 0.943±0.010
0.93+0.04-0.03
--- --- --- --- --- --- --- --- --- ---
log g
(log10(cm/s2))
4.4245900+0.0515368-0.1356500
4.43±0.02 4.43±0.02 --- 4.48 4.58±0.05 --- --- --- 4.45±0.01 4.45±0.08 ---
4.48+0.05-0.01
--- --- --- --- --- 4.58 --- --- 4.50 ---
Teff
(K)
5250.000+123.300-171.847
5172±18 5172±18
5306.00+241.00-152.35
5235 5334±20 --- --- --- 5196±24 5234±30 --- --- --- --- --- --- --- 5307 --- --- 5200 ---
v sin i
(km/s)
--- --- <1.23±0.01 --- --- --- --- --- 3.3±0.9 --- --- --- --- 2.5±0.5 --- --- --- --- --- --- --- 2.0 ---
L
(log10(L⦿))
-0.1969510+0.0124975-0.0103906
--- ---
-0.19410696+0.00058394-0.00058470
-0.180 +0.061-0.071
--- --- --- ---
-0.235 +0.010-0.011
--- --- --- --- --- --- --- --- --- --- --- --- ---
γ
(km/s)
--- --- --- 27.25733445824737±0.14018414499934 --- --- --- --- 27.40949±0.00008 --- --- --- --- 27.8 --- --- 27.252±0.009 --- --- --- 27.4 --- ---
ρ
(g/cm3)
1.4185108+0.5378713-0.2174488
1.41+0.15-0.10
--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity, Transit
Source Bourrier et al. 2018 Knapp et al. 2020 Dai et al. 2019 Demory et al. 2016 Demory et al. 2016 Baluev 2015 Bourrier & Hébrard 2014 Nelson et al. 2014 Endl et al. 2012 Demory et al. 2011 Winn et al. 2011 Wright et al. 2009 McArthur et al. 2004
Mp
(M)
7.99+0.32-0.33
---
7.74+0.37-0.30
8.08±0.31 8.08±0.31 8.13928±0.23201 ---
8.09479 +0.26061-0.25743
8.37±0.38
7.81+0.58-0.53
8.63±0.35 --- ---
Mp
(MJup)
0.0251+0.0010-0.0010
---
0.0244+0.0012-0.0009
0.0254±0.0010 0.0254±0.0010 0.02561±0.00073 ---
0.02547 +0.00082-0.00081
0.026±0.001
0.0246+0.0018-0.0017
0.027±0.001 --- ---
P
(days)
0.7365474+0.0000013-0.0000014
--- 0.737 0.736539±0.000007 --- 0.7365515±0.0000015
0.7365417+0.0000025-0.0000028
0.7365478 +0.0000016-0.0000012
0.736546±0.000003 0.7365437±0.0000052 0.7365400±0.0000030 2.79674±0.00010 2.808±0.002
ρ
(g/cm3)
6.66+0.43-0.40
---
6.25+0.74-0.70
6.4+0.8-0.7
6.3+0.8-0.7
--- --- --- 4.50±0.20
4.78+1.31-1.20
5.9 +1.5-1.1
--- ---
Rp
(R)
1.875±0.029 ---
1.897+0.044-0.046
1.91±0.08 1.92±0.08 --- --- ---
2.173 +0.097-0.098
2.08+0.16-0.17
2.00±0.14 --- ---
Rp
(RJup)
0.1673±0.0026 ---
0.1692+0.0039-0.0041
0.170±0.007 0.171±0.007 --- --- --- 0.194±0.009
0.186+0.014-0.015
0.178±0.012 --- ---
Rp/R
0.0182±0.0002 ---
0.01821+0.00027-0.00029
0.0187±0.0007 0.0187±0.0007 ---
0.01936+0.00079-0.00075
--- ---
0.0202+0.0015-0.0016
0.0195±0.0013 --- ---
K
(m/s)
6.02+0.24-0.23
--- 6.00±0.17 --- --- 5.97±0.17 6.30±0.21 6.12±0.20 6.30±0.21 5.93±0.42 6.1±0.2 3.73±0.53 6.665±0.810
b
0.39±0.03 --- --- 0.41±0.05
0.36+0.07-0.09
--- --- --- ---
0.16+0.13-0.10
0.00±0.24 --- ---
Occ. Depth
(%)
--- --- --- 0.0154±0.0023 0.0083±0.0014 --- --- --- --- --- --- --- ---
i
(deg)
83.59+0.47-0.44
--- ---
83.3+0.9-0.8
83+2-1
90
85.4+2.8-2.1
90.36 +3.96-4.66
---
87.3+1.7-2.1
90.0±3.8 --- ---
a
(au)
0.01544±0.00005 --- --- 0.01544±0.00009 0.01544±0.00009 0.015690907±0.000000021 --- 0.015439±0.000015 0.01583±0.00020 0.01544±0.00009 0.01583±0.00020 0.0377±0.0022 0.038±0.001
TC
(days)
2457063.2096+0.0006-0.0004
--- --- 2455733.013±0.007 2455733.008±0.002 ---
2455962.0697+0.0017-0.0018
--- ---
2455568.0265+0.0015-0.0010
2455607.05562±0.00087 --- ---
ω
(deg)
86.00+30.70-33.40
--- --- --- --- 72±42 --- --- 90
202+88-70
--- 157±38 261.65±41.14
e
0.05±0.03 --- --- --- --- 0.040±0.027 ---
0.028 +0.022-0.019
0.0
0.0610+0.0650-0.0430
--- 0.264±0.060 0.174±0.127
Tp
(days)
--- --- --- --- --- --- --- --- --- --- --- 2447578.21590±0.00010 2453295.31±0.32
Mp sin i
(M)
--- --- --- --- --- --- --- --- --- 7.80±0.56 --- 7.4687±1.5573 14±3
Mp sin i
(MJup)
--- --- --- --- --- --- --- --- --- 0.0245±0.0018 --- 0.0235±0.0049 0.045±0.010
a/R
3.52±0.01 --- --- --- --- ---
3.523+0.042-0.040
--- ---
3.517+0.041-0.040
3.6114 +0.0570-0.0552
--- ---
T14
(hours)
--- --- --- --- --- ---
1.58+0.08-0.07
--- ---
1.60+0.03-0.05
1.5792±0.0312 --- ---
λ
(deg)
--- --- --- --- --- ---
72.4 +12.7-11.5
--- --- --- --- --- ---
δ
(%)
--- 0.0374±0.0170 --- --- --- --- --- --- --- 0.0410±0.0063 0.0380±0.0052 --- ---
Mp
(M)
--- --- --- --- --- --- --- --- --- 7.81±0.56 --- --- ---
Mp
(MJup)
--- --- --- --- --- --- --- --- --- 0.0246±0.0018 --- --- ---
Teq
(K)
--- --- --- --- --- --- --- --- --- 1958±15 --- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Source Bourrier et al. 2018 Salz et al. 2015 Baluev 2015 Nelson et al. 2014 Endl et al. 2012 Wright et al. 2009 Fischer et al. 2008 McArthur et al. 2004 Naef et al. 2004 Marcy et al. 2002 Butler et al. 1997
Tp
(days)
--- --- --- --- 2453035.0±2.2 2447572.0±1.2 2450002.94749±1.2 2453021.08±0.01 2450000.80±0.48 2450001.479 ---
ω
(deg)
-21.50+56.90-89.80
--- 98±53 --- 110±54 164±30 131.94±30 131.49±33.27 63±12 99.0±35.0 41
Mp sin i
(M)
255.4±2.9 --- --- --- 254.25±3.814 260.61±38.14 261.881±2.225 249±29 289.21±6.36 267±22 267
Mp sin i
(MJup)
0.8036+0.0092-0.0091
--- --- --- 0.80±0.012 0.82±0.12 0.824±0.007 0.784±0.090 0.91±0.02 0.84±0.07 0.84
e
0.0±0.0 0 0.0034±0.0032
0.0023 +0.0025-0.0016
0.004±0.003 0.0159±0.0080 0.014±0.008 0.0197±0.0120 0.030±0.023 0.020±0.020 0.051±0.013
P
(days)
14.6516±0.0001 14.6 14.65152±0.00015
14.465314 +0.00090-0.00095
14.651±0.0001 14.65126±0.00070 14.65162±0.0007 14.67±0.01 14.647±0.001 14.6530±0.0006 14.6480±0.0009
K
(m/s)
71.37±0.21 --- 71.40±0.29 71.47±0.21 71.11±0.24 71.84±0.41 --- 67.365±0.820 78.3±1.8 72.2±1.0 77.1±0.9
a
(au)
0.1134±0.0006 0.113 0.11522725±0.00000079 0.11339±0.00011 0.1134±0.0006 0.1138±0.0066 0.115±0.0000011 0.115±0.003 0.115 0.115±0.003 0.11
Mp
(M)
--- 254.25 263.9785±1.0488
266.966 +41.634-9.852
--- --- --- --- --- --- ---
Mp
(MJup)
--- 0.80 0.8306±0.0033
0.840 +0.131-0.031
--- --- --- --- --- --- ---
i
(deg)
--- --- 90
89.73 +24.49-24.54
--- --- --- --- --- --- ---
Teq
(K)
--- 700 --- --- --- --- --- --- --- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Source Bourrier et al. 2018 Baluev 2015 Nelson et al. 2014 Endl et al. 2012 Wright et al. 2009 Fischer et al. 2008 McArthur et al. 2004
Tp
(days)
--- --- --- 2453083±3 2447547.5±3.3 2449989.3385±3.3 2453028.63±0.25
ω
(deg)
2.40+43.10-49.20
51±84 --- 356±22 57±29 77.9±29.0 244.39±10.65
Mp sin i
(M)
51.2±1.3 --- --- 52.440±1.7162 52.440±8.263 53.711±2.543 69.0±12.7
Mp sin i
(MJup)
0.1611±0.0040 --- --- 0.165±0.0054 0.165±0.026 0.169±0.008 0.217±0.040
e
0.03±0.02 0.020±0.031
0.072 +0.013-0.014
0.07±0.02 0.053±0.052 0.086±0.052 0.44±0.08
P
(days)
44.3989+0.0042-0.0043
44.4175±0.0073
44.373 +0.020-0.018
44.38±0.007 44.3787±0.0070 44.3446±0.007 43.93±0.25
K
(m/s)
9.890±0.220 10.18±0.33 10.48±0.21 10.12±0.23 10.06±0.43 --- 12.946±0.860
a
(au)
0.2373±0.0013 0.241376±0.000026 0.23735±0.00024 0.237±0.0013 0.238±0.014 0.240±0.000045 0.240±0.008
Mp
(M)
--- 54.4738±1.7480
56.6985 +8.7400-2.4790
--- --- --- ---
Mp
(MJup)
--- 0.1714±0.0055
0.1784 +0.0275-0.0078
--- --- --- ---
i
(deg)
--- 90
89.73 +24.49-24.54
--- --- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Source Bourrier et al. 2018 Baluev 2015 Nelson et al. 2014 Endl et al. 2012 Wright et al. 2009 Fischer et al. 2008
Tp
(days)
--- --- --- 2451878±5 2447488.0±1.1 2450080.9108±1.1
ω
(deg)
-97.60+37.00-51.30
166±15 --- 139±8 206±60 181.1±60
Mp sin i
(M)
47.8±2.4 --- --- 54.664±2.543 44.812±12.395 45.766±12.713
Mp sin i
(MJup)
0.1503±0.0076 --- --- 0.172±0.008 0.141±0.039 0.144±0.04
e
0.080+0.050-0.040
0.305±0.075
0.080 +0.102-0.057
0.32±0.05 0.00±0.20 0.2±0.2
P
(days)
259.88±0.29 262.00±0.51 260.91±0.36 261.2±0.4 260.7±1.1 260.00±1.1
K
(m/s)
5.14+0.26-0.25
4.87±0.43 4.80±0.20 6.2±0.3 4.75±0.60 ---
a
(au)
0.7708+0.0043-0.0044
0.7880±0.0010 0.7733±0.0010 0.77±0.005 0.775±0.045 0.781±0.007
Mp
(M)
--- 44.812±3.814
47.0051 +6.9602-2.9557
--- --- ---
Mp
(MJup)
--- 0.141±0.012
0.1479 +0.0219-0.0093
--- --- ---
i
(deg)
--- 90
89.73 +24.49-24.54
--- --- ---
Status
Confirmed Planet
Detected By
Radial Velocity
Tools
Source Bourrier et al. 2018 Baluev 2015 Nelson et al. 2014 Endl et al. 2012 Wright et al. 2009 Fischer et al. 2008 McArthur et al. 2004 Naef et al. 2004 Marcy et al. 2002
Tp
(days)
--- --- --- 2453490±437 2446860±230 2452500.60±230 2452837.69±68.87 2450568±200 2452785±250
ω
(deg)
-69.1+9.1-7.9
44±31 --- 254±32 163±32 181.3±32 234.73±6.74 347±23 201±22
Mp sin i
(M)
991.60+30.70-33.10
--- --- 1121.89±25.43 1220.42±184.33 1218.827±25.425 1243±165 918.49±149.37 1287±127
Mp sin i
(MJup)
3.12±0.10 --- --- 3.53±0.08 3.84±0.58 3.835±0.08 3.912±0.520 2.89±0.47 4.05±0.40
e
0.13±0.02 0.019±0.013
0.0269 +0.0061-0.0065
0.02±0.008 0.063±0.030 0.025±0.03 0.327±0.280 0.24±0.13 0.16±0.06
P
(days)
5574.2+93.8-88.6
4825±39
4867 +25-26
4909±30 5370±230 5218±230 4517.4±77.8 4545±1421 5360±400
K
(m/s)
38.6+1.3-1.4
48.29±0.80
47.30 +0.44-0.41
45.2±0.4 47.2±1.8 --- 49.786±1.530 37.8±3.9 49.3±2.5
a
(au)
5.957+0.074-0.071
5.503±0.030 5.446±0.020 5.47±0.06 5.84±0.39 5.77±0.11 5.257±0.208 5.28 5.9±0.9
Mp
(M)
--- 1232.493±21.612
1226.77 +190.69-47.67
--- --- --- --- --- ---
Mp
(MJup)
--- 3.878±0.068
3.86 +0.60-0.15
--- --- --- --- --- ---
i
(deg)
--- 90
89.73 +24.49-24.54
--- --- --- --- --- ---
Literature Stellar Spectra (11 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
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     echelle grating Optical California Planet Search
Spectra     Infrared Beichman et al. 2006
Literature Time Series (2 File Types, 10 Files)
File Type Data Points Filter Reference
Photometric Light Curve     111 Hp (Hipparcos) Hipparcos and Tycho Catalogs
Radial Velocity Curve     274 Optical Spectra Howard & Fulton 2016
Radial Velocity Curve     193 Optical Spectra Howard & Fulton 2016
Radial Velocity Curve     24 Optical Spectra Howard & Fulton 2016
Radial Velocity Curve     14 Optical Spectra Howard & Fulton 2016
Radial Velocity Curve     250 Optical Spectra Fischer et al. 2008
Radial Velocity Curve     70 Optical Spectra Fischer et al. 2008
Radial Velocity Curve     119 Optical Spectra McArthur et al. 2004
Radial Velocity Curve     48 Optical Spectra Naef et al. 2004
Radial Velocity Curve     146 Optical Spectra Marcy et al. 2002
Known Objects
5 Confirmed Planets
1 2MASS Point Source Catalog
Data Files
1 SuperWASP Time Series
5 Associated Literature Data
Known Objects
5 Confirmed Planets
1 2MASS Point Source Catalog
Data Files
1 SuperWASP Time Series
5 Associated Literature Data
System
Star
Confirmed
Candidate
Refuted
Controversial
False Positive
Aliases
Data Access
Transit Prediction Service
Time Series
Kepler | K2
External Link
Search
Browse
Download