CD−44 170

{{Starbox begin

|name=CD−44°170

}}

{{Starbox observe

| epoch = J2000

| constell = Phoenix

| ra = {{RA|00|39|58.8243}}

| dec = {{DEC|-44|15|11.5824}}

| appmag_v = 11.401

}}

{{Starbox character

| type = main-sequence star

| class = M0.5V{{cite journal |arxiv=2001.02577 |doi=10.3847/1538-4365/ab5e7c |title=Search for Nearby Earth Analogs. II. Detection of Five New Planets, Eight Planet Candidates, and Confirmation of Three Planets around Nine Nearby M Dwarfs |year=2020 |last1=Feng |first1=Fabo |last2=Butler |first2=R. Paul |last3=Shectman |first3=Stephen A. |last4=Crane |first4=Jeffrey D. |last5=Vogt |first5=Steve |last6=Chambers |first6=John |last7=Jones |first7=Hugh R. A. |last8=Wang |first8=Sharon Xuesong |last9=Teske |first9=Johanna K. |last10=Burt |first10=Jenn |last11=Díaz |first11=Matías R. |last12=Thompson |first12=Ian B. |journal=The Astrophysical Journal Supplement Series |volume=246 |issue=1 |page=11 |bibcode=2020ApJS..246...11F |s2cid=210064560 |doi-access=free }}

}}

{{Starbox astrometry

| radial_v = 11.85{{±|0.19}}{{cite Gaia EDR3|4980466929965023104}}

| prop_mo_ra = 483.002

| prop_mo_dec = −221.111

| parallax = 42.3320

| p_error = 0.0248

| parallax_footnote =

}}

{{Starbox detail

| source =

| mass = 0.53

| radius = 0.52{{cite journal |arxiv=1604.03135 |doi=10.3847/2041-8205/821/1/L19 |title=The Impact of Stellar Rotation on the Detectability of Habitable Planets Around M Dwarfs |year=2016 |last1=Newton |first1=Elisabeth R. |last2=Irwin |first2=Jonathan |last3=Charbonneau |first3=David |last4=Berta-Thompson |first4=Zachory K. |last5=Dittmann |first5=Jason A. |journal=The Astrophysical Journal |volume=821 |issue=1 |pages=L19 |bibcode=2016ApJ...821L..19N |s2cid=73538034 |doi-access=free }}

| temperature = 3604{{±|72}}{{cite journal |doi=10.3847/1538-4357/ab1fe9 |title=Characterization of a Sample of Southern M Dwarfs Using Harps and X-shooter Spectra |year=2019 |last1=Kuznetsov |first1=M. K. |last2=Del Burgo |first2=C. |last3=Pavlenko |first3=Ya. V. |last4=Frith |first4=J. |journal=The Astrophysical Journal |volume=878 |issue=2 |page=134 |bibcode=2019ApJ...878..134K |doi-access=free }}

| luminosity =0.04597{{±|0.00087}}{{cite journal |arxiv=1910.12054 |doi=10.3847/1538-4357/ab5640 |title=Exomoons in the Habitable Zones of M Dwarfs |year=2019 |last1=Martínez-Rodríguez |first1=Héctor |last2=Caballero |first2=José Antonio |last3=Cifuentes |first3=Carlos |last4=Piro |first4=Anthony L. |last5=Barnes |first5=Rory |journal=The Astrophysical Journal |volume=887 |issue=2 |page=261 |bibcode=2019ApJ...887..261M |s2cid=204904780 |doi-access=free }}

| gravity =

| metal_fe = {{val|-0.09|0.09}}

| rotation = 31.8 d

| rotational_velocity =

| age_gyr =

}}

{{Starbox catalog

| names = {{odlist|2MASS = J00395880-4415117|GJ=27.1|Gaia DR2=4980466929964496128|TYC=7531-1014-1|HIP=3143}}{{cite simbad|title=CD-44 170|access-date=2021-04-26}}

}}

{{Starbox reference

| Simbad = CD-44+170

}}

CD−44 170, also known as Gliese 27.1, Gliese 9018 and HIP 3143, is an M-type main-sequence star. Its surface temperature is {{Convert|3604|K|F C|abbr=on}}{{±|72}} K. The star's concentration of heavy elements is similar to that of the Sun.

Planetary system

In 2014, a planet named Gliese 27.1 b with an orbital period of 16 days was announced. It was discovered using the radial velocity method.{{cite journal |arxiv=1403.0430 |doi=10.1093/mnras/stu358 |title=Bayesian search for low-mass planets around nearby M dwarfs – estimates for occurrence rate based on global detectability statistics |year=2014 |last1=Tuomi |first1=Mikko |last2=Jones |first2=Hugh R. A. |last3=Barnes |first3=John R. |last4=Anglada-Escudé |first4=Guillem |last5=Jenkins |first5=James S. |journal=Monthly Notices of the Royal Astronomical Society |volume=441 |issue=2 |pages=1545–1569 |doi-access=free |bibcode=2014MNRAS.441.1545T }} The planetary equilibrium temperature is {{Convert|406|K|F C|abbr=on}}. The planet's existence was doubted until 2020 because the putative orbital period is equal to half of the star's rotational period.

{{OrbitboxPlanet begin

| name = Gliese 27.1

| table_ref =

}}

{{OrbitboxPlanet hypothetical

| exoplanet = b

| mass_earth = > 13{{±|4.1|6.6}}

| radius_earth = >3.63

| semimajor = 0.101{{±|0.009|0.013}}

| period = 15.8190{{±|0.0049|0.0026}}

| eccentricity =

| inclination =