Planet Proxima Centauri c

Name Proxima Centauri c
Planet Status Controversial
Discovered in 2019
Mass 0.0245 ( -0.0084 +0.0087 ) MJ
Mass*sin(i) 0.0179 (± 0.006) MJ +
Semi-Major Axis 1.48 (± 0.08) AU
Orbital Period 1928.0 (± 20.0) day +
Eccentricity 0.0
ω
Tperi 2456202.0 (± 21.0) JD
Radius
Inclination 133.0 (± 1.0) deg
Update 2022-07-29
Detection Method Radial Velocity
Mass Detection Method Astrometry
Radius Detection Method
Primary transit
Secondary transit
λ
Impact Parameter b
Time Vr=0
Velocity Semiamplitude K 1.2 (± 0.4) m/s
Calculated temperature 39.0 ( -1.6 +1.8 ) K
Measured temperature
Hottest point longitude
Geometric albedo
Surface gravity log(g/gH)
Alternate Names

Star

Proxima Centauri
Name Proxima Centauri
Distance 1.295 pc
Spectral type M5.5V
Apparent magnitude V 11.13
Mass 0.12 (± 0.015) MSun
Age
Effective temperature 3050.0 (± 100.0) K
Radius 0.141 (± 0.021) RSun
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000 14:29:42.9
Dec2000 -63:10:10
Alternate Names alpha Cen C, GL 551, HIP 70890
Planetary system
2 planets

More data

Observability Predictor

Remarks

29 Jul 2022
"The LBL analysis of the Proxima Centauri HARPS post-upgrade data alone easily recovers the Proxima b signal and also provides a 2-σ detection of the recently confirmed 5-day Proxima d planet, but argues against the presence of the candidate Proxima c with a period of 1900 days." (Artigau et al. 2022)

Other web-pages

Announcement by Damasso & Del Sordo  
Scientific American  

Related publications

Stellar and substellar companions from Gaia EDR3 -- Proper motion anomaly and resolved common proper motion pairs
2022 KERVELLA P., ARENOU F. & THEVENIN F.
Astron. & Astrophys., 657, A7
paper   arxiv

Line-by-line velocity measurements, an outlier-resistant method for precision velocimetry
2022 ARTIGAU E., CADIEUX Ch., COOK N., DOYON R., VANDAL Th. et al.
Astron. J., accepted
arxiv  

The strong suppression of Galactic cosmic rays reaching AU Mic b, c and Prox Cen b
2022 MESQUITA A., RODGERS-LEE D., VIDOTTO A. & KAVANAGH R.
MNRAS, in press
paper  arxiv  

Deceleration of Exoplanet Missions Utilizing Scarce Antimatter
2022 JACKSON G.
Acta Astronaut., in press
paper  

Cost-Optimal System Performance Maps for Laser-Accelerated Sailcraft
2022 PARKIN K.
arxiv  

The high energy spectrum of Proxima Centauri simultaneously observed at X-ray and FUV wavelengths
2022 FUHRMEISTER B., ZISIK A., SCHNEIDER P., ROBRADE J., SCHMITT J. et al.
Astron. & Astrophys., in press
paper   arxiv  

Habitable planet formation around low-mass stars: Rapid accretion, rapid debris removal and the essential contribution of external giants
2022 CLEMENT M., QUINTANA E. & QUARLES B.
ApJ, 928, 91
paper   arxiv

Monitoring the radio emission of Proxima Centauri
2021 PEREZ-TORRES M., GOMEZ J., ORTIZ J., LETO P. et al.
Astron. & Astrophys., 645, A77
paper   arxiv

Orbital Stability of Planet-hosting Triple-star Systems according to Hill: Applications to Alpha Centauri and 16 Cygni
2021 BOYLE L. & CUNTZ M.
Res. Notes AAS, 5, 285
paper  

The Copernican Principle Rules Out BLC1 as a Technological Radio Signal from the Alpha Centauri System
2021 SIRAJ A. & LOEB A.
arxiv

A Search for Optical Laser Emission from Proxima Centauri
2021 MARCY G.
MNRAS, 505, 3537
paper   arxiv

Discovery of an Extremely Short Duration Flare from Proxima Centauri Using Millimeter through Far-ultraviolet Observations
2021 MACGREGOR M., WEINBERGER A., PARKE LOYD R., SHKOLNIK E., BARCLAY Th. et al.
ApJ. Letters, 911, L25
paper  

Stellar and substellar companions from Gaia DR2
2021 KERVELLA P., ARENOU F., MIGNARD F., THEVENIN F., SCHNEIDER J. et al.
SF2A 2021
paper  

No Transits of Proxima Centauri Planets inHigh-Cadence TESS Data
2021 GILBERT E., BARCLAY Th., KRUSE E., QUINTANA E. & WALKOWICZ L.
Front. Astron. Space Sci., accepted
arxiv  

Laser Communication with Proxima and Alpha Centauri using the Solar Gravitational Lens
2021 MARCY G., TELLIS N. & WISHNOW E.
MNRAS, accepted
arxiv  

A radio technosignature search towards Proxima Centauri resulting in a signal of interest
2021 SMITH Sh., PRICE D., SHEIKH S., CZECH D., CROFT S. et al.
Nature Astronomy, 5, 1148
paper   arxiv

Analysis of the Breakthrough Listen signal of interest blc1 with a technosignature verification framework
2021 SHEIKH S., SMITH Sh., PRICE D., DEBOER D., LACKI B. et al.
Nature Astronomy, 5, 1153
paper   arxiv  

No Redetections of blc1 in 39 hr of Reobservation Campaigns of Proxima Centauri
2021 SHEIKH S., SMITH Sh., PRICE D., LEBOFSKY M., SEMEION A., CORDES J. et al.
Res. Notes AAS., 5, 248
paper  

A Moving Target—Revising the Mass of Proxima Centauri c
2020 BENEDICT F. & McARTHUR B.
Res. Notes AAS, 4, 86
paper

An Earth-like stellar wind environment for Proxima Centauri c
2020 ALVARO-GOMEZ J., DRAKE J., GARRAFFO C., COHEN O., POPPENHÄGER K. et al.
ApJ. Letters, accepted
arxiv  

EvryFlare III: Temperature Evolution and Habitability Impacts of Dozens of Superflares Observed Simultaneously by Evryscope and TESS
2020 HOWARD W., CORBELT H., LAW N., RATZLOFF J., GALLIHER N. et al.
ApJ, 902, 115
paper    arxiv

The large-scale magnetic field of Proxima Centauri near activity maximum
2020 KLEIN S., DONATI J.-F., HEBRARD E., ZAIR B., FOLSOM C. et al.
MNRAS, in press
paper   arxiv  

A Flare-Type IV Burst Event from Proxima Centauri and Implications for Space Weather
2020 ZIC A., MURPHY T., LYNCH Ch., HEALD G., LENC E. et al.
ApJ
paper   arxiv

Proxima Centauri -- the nearest planet host observed simultaneously with AstroSat, Chandra and HST
2020 LALITHA S., SCHMITT J., SINGH K., SCHNEIDER P., PARKE LOYD R. et al.
MNRAS, 498, 3658
paper  arxiv  

Searching for a cometary belt around Trappist-1 with ALMA
2020 MARINO S., WYATT M., KENNEDY G., KAMA M., MATRA L. et al.
MNRAS, 492, 6067
paper  arxiv  

Diverse outcomes of planet formation and composition around low-mass stars and brown dwarfs
2020 MIGUEL Y., CRIDLAND A., ORMEL C., FORTNEY J. & IDA S.
MNRAS, 491, 1998
paper  arxiv  

A low-mass planet candidate orbiting Proxima Centauri at a distance of 1.5 au
2020 DAMASSO M., DEL SORDO F., ANGLADA-ESCUDE G., GIACOBBE P., SOZZETTI A. et al.
Science Advance, 6, eaax7467
paper

The Single-mode Complex Amplitude Refinement (SCAR) coronagraph: II. Lab verification, and toward the characterization of Proxima b
2020 HAFFERT S., POR E., KELLER C., KENWORTHY M., DOELMAN D., SNIK F. & ESCUTI M.
Astron. & Astrophys., 635, A56
paper  arxiv  

Orbital inclination and mass of the exoplanet candidate Proxima c
2020 KERVELLA P., ARENOU F. & SCHNEIDER J.
Astron. & Astrophys., 635, L14
paper   arxiv

Expectations for the confirmation of Proxima c from a long-term radial velocity follow-up
2020 DAMASSO M. & DEL SORDO F.
MNRAS, 494, 1387
paper   arxiv

A Preliminary Mass for Proxima Centauri C
2020 BENEDICT F. & McARTHUR B.
Res. Notes AAS, 4, 46
paper

Searching for the near infrared counterpart of Proxima c using multi-epoch high contrast SPHERE data at VLT
2020 GRATTON R., ZURLO A., LE COROLLER H., DAMASSO M., DELSORLO F. et al.
Astron. & Astrophys., 638, A120
paper   arxiv

Revisiting Proxima with ESPRESSO
2020 MASCARENO A., FARIA J., FIGUEIRA P., LOVIS Ch., DAMASSO M. et al.
Astron. & Astrophys., 639, A77
paper   arxiv

NEAR: First Results from the Search for Low-Mass ­Planets in a Cen
2019 KASPER M., ARSENAULT R., KÄFT U., JAKOB G., LEVERATTO S. et al.
The Messenger, 178, 5
paper  

Observation of a possible superflare on Proxima Centauri
2019 KIELKOPF J., HART Rh., CARTER B. & MARSDEN S.
MNRAS, 486, L31
paper  arxiv  

Directly testing gravity with Proxima Centauri
2019 BANIK I. & KROUPA P.
MNRAS, 487, 1653
paper  arxiv  

Flaring activity of Proxima Centauri from TESS observations: quasi-periodic oscillations during flare decay and inferences on the habitability of Proxima b
2019 VIDA K., OLAH K., KOVARI Zs., van DRIEL-GESZTELYI L. & MOOR A.
ApJ, 884, 160
paper  arxiv  

Model of the Search For Extraterrestrial Intelligence with Coronagraphic Imaging
2019 VIDES Ch., MACINTOSH B., BINDER B., DE ROSA R., RUFFIO J.-B. & SAVRANSKY D.
Astron. J., 158, 207
paper  arxiv  

The gravitational mass of Proxima Centauri measured with SPHERE from a microlensing event
2018 ZURLO A., GRATTON R., MESA D., DESIDERA S., ENIA A. et al.
MNRAS, 480, 236
paper   arxiv

ALMA Discovery of Dust Belts Around Proxima Centauri
2017 ANGLADA G., AMADO P., ORTIZ J., GOMEZ J., MACIAS E. et al.
ApJ Lett, 850, L6
paper  arxiv  

Proxima reloaded: Unravelling the stellar noise in radial velocities
2016 DAMASSO M. & DEL SORDO F.
Astron. & Astrophy., 599, A126
paper  arxiv  ADS

Perturbation of Compact Planetary Systems by Distant Giant Planets
2016 HANSEN, B.
MNRAS, submitted
arxiv  paper   ADS  

Interferometric Astrometry of Proxima Centauri and Barnard's Star Using Hubble Space Telescope Fine Guidance Sensor 3: Detection Limits for sub-Stellar Companions.
1999 BENEDICT F., MCARTHUR B., CHAPPELL D., NELAN E., JEFFERYS W., Van ALTENA W., LEE J., CORNELL D., SHELUS D., HEMENWAY P., FRANZ O., WASSERMAN L., DUNCOMBE R., STORY A., WHIPPLE A. & FREDRICK L.
Astron. J.,, 118, 1086
paper  

Precise radial velocities of Proxima Centauri. Strong constraints on a substellar companion.
1999 KÜRSTER M., HATZES A., COCHRAN W., S. DOEBEREINER S., DENNERL K. & ENDL M.
Astron. & Astrophys., 344, L5
paper   AES

A possible companion to Proxima Centauri
1998 SCHULTZ A., HART H., HERSHEY J., HAMILTON F., KOCHTE M., BRUHWEILER F., BENEDICT G., CALDWELL J., CUNNINGHAM C., NAILONG WU., FRANZ O., KEYES C. & BRANDT J.
Astron. J., 115, 345
paper  

Parallaxes, Proper Motions and Low-mass Companion Detection Limits for Proxima Centauri and Barnard's Star
1997 BENEDICT F., McARTHUR B., JEFFERYS W., NELAN E., van ALTENA W. et al.
BAAS, 29, 1316
ADS

Continuation of An Astrometric Search for Planetary Companions to Proxima Centauri
1996 BENEDICT G.
HST Proposa, ID 6768. Cycle
arxiv

Citations References Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation Feedback Astrometric Search for Planets Near Proxima Centauri: A Status Report (10/95)
1995 BENEDICT G., McARTUR B., NELAN E., STORY D., WIPPLE A. et al.
BAAS, 27, 1158
arxiv

Mass Detection Limits for Planetary Companions to Barnard's Star and Proxima Centauri
1995 BENEDICT G., McARTHUR B., WIPPLE A., NELAN E., STORY D. et al.
BAAS, 27, 1381
ADS