UPSA Object Registry
Registry · deep sky

55 Cnc

Star G8 V
harvesting The full record is being pulled from the archives right now — measurement tables, the Gaia row, catalogue photometry. This page will fill itself in.
Right ascension
08h 52m 35.24s
Declination
+28° 19′ 47.3″
Galactic l, b
196.8, 37.7
Distance
12.585 pc

Published measurements

3 quantities measured more than once
One object can carry a dozen published estimates of the same quantity. The register keeps them side by side rather than picking a winner — the citation is part of the value.

Mass 13 values

ValueUnitUncertainty Band / methodSourceReferenceYear
1.015 M_sun ± 0.051 NASA Exoplanet Archive Moutou et al. 2026 2026
0.905 M_sun ± 0.015 NASA Exoplanet Archive Zhao et al. 2023 2023
0.974708 M_sun ± 0.04506 NASA Exoplanet Archive Rosenthal et al. 2021 2021
0.873 M_sun ± 0.051 NASA Exoplanet Archive Dai et al. 2019 2019
0.905 M_sun ± 0.015 NASA Exoplanet Archive Bourrier et al. 2018 2018
1.015 M_sun ± 0.051 NASA Exoplanet Archive Crida et al. 2018 2018
0.95 M_sun NASA Exoplanet Archive Baluev 2015 2015
0.905 M_sun ± 0.015 NASA Exoplanet Archive Demory et al. 2011 2011
0.963 M_sun ± 0.051 NASA Exoplanet Archive Winn et al. 2011 2011
0.9 M_sun ± 0.14 NASA Exoplanet Archive TICv8 2008
0.95 M_sun ± 0.08 NASA Exoplanet Archive McArthur et al. 2004 2004
0.95 M_sun NASA Exoplanet Archive Marcy et al. 2002 2002
Show the remaining 1
ValueUnitUncertainty Band / methodSourceReferenceYear
0.85 M_sun NASA Exoplanet Archive Butler et al. 1997 1997

Radius 10 values

ValueUnitUncertainty Band / methodSourceReferenceYear
0.98 R_sun ± 0.016 NASA Exoplanet Archive Moutou et al. 2026 2026
0.943 R_sun ± 0.01 NASA Exoplanet Archive Zhao et al. 2023 2023
0.964411 R_sun ± 0.02082 NASA Exoplanet Archive Rosenthal et al. 2021 2021
0.954 R_sun ± 0.017 NASA Exoplanet Archive Dai et al. 2019 2019
0.943 R_sun ± 0.01 NASA Exoplanet Archive Bourrier et al. 2018 2018
0.98 R_sun ± 0.016 NASA Exoplanet Archive Crida et al. 2018 2018
0.943 R_sun ± 0.01 NASA Exoplanet Archive Demory et al. 2011 2011
0.943 R_sun ± 0.01 NASA Exoplanet Archive Winn et al. 2011 2011
0.963515 R_sun ± 0.07774 NASA Exoplanet Archive TICv8 2008
0.963515 R_sun ± 0.06545 NASA Exoplanet Archive ExoFOP 2004

Effective temperature 10 values

ValueUnitUncertainty Band / methodSourceReferenceYear
5,198 K ± 31 NASA Exoplanet Archive Moutou et al. 2026 2026
5,292 K NASA Exoplanet Archive Harada et al. 2025 2025
5,272 K ± 24 NASA Exoplanet Archive Zhao et al. 2023 2023
5,317.89 K ± 80.51 NASA Exoplanet Archive Rosenthal et al. 2021 2021
5,172 K ± 18 NASA Exoplanet Archive Dai et al. 2019 2019
5,172 K ± 18 NASA Exoplanet Archive Bourrier et al. 2018 2018
5,234 K ± 30 NASA Exoplanet Archive Demory et al. 2011 2011
5,250 K ± 123.3 NASA Exoplanet Archive TICv8 2008
5,250 K ± 147.6 NASA Exoplanet Archive ExoFOP 2004
5,200 K NASA Exoplanet Archive Butler et al. 1997 1997

Related objects

ObjectTypeRelation
55 Cnc b Exoplanethost
55 Cnc c Exoplanethost
55 Cnc d Exoplanethost
55 Cnc e Exoplanethost
55 Cnc f Exoplanethost

In the same field

within 9 arcmin · wider search
ObjectTypeSeparationV
55 Cnc f Exoplanet 0″ 5.951
55 Cnc e Exoplanet 0″ 5.951
55 Cnc d Exoplanet 0″ 5.951
55 Cnc c Exoplanet 0″ 5.951
55 Cnc b Exoplanet 0″ 5.951
* rho01 Cnc f Planet 8.353″ —
* rho01 Cnc e Planet 8.353″ —
* rho01 Cnc HighPM* 8.353″ —
* rho01 Cnc b Planet 8.353″ —
* rho01 Cnc c Planet 8.353″ —
* rho01 Cnc d Planet 8.353″ —

Provenance

where this card came from
ArchiveRead at (UTC)Record
Seeded from the bulk archive load; no per-object fetch yet.

Machine-readable: /api/v1/object/55-cnc · Registry entry updated 2026-08-14.