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| #REDIRECT ] | |||
| {{short description|Red dwarf}} | |||
| {{Infobox planet | |||
| | name = ] Bb | |||
| | symbol = | |||
| | image = | |||
| | image_size = | |||
| | image_alt = | |||
| | caption = | |||
| | background = | |||
| | bgcolour = | |||
| | label_width = | |||
| <!-- DISCOVERY --> | |||
| | discoverer = Guenther et al. | |||
| | discovery_site = ] | |||
| | discovered = November 27, 2009 | |||
| | discovery_method = ] | |||
| | discovery_ref = | |||
| <!-- DESIGNATIONS --> | |||
| | exosolar planets = | |||
| | minorplanet = | |||
| | extrasolarplanet = | |||
| | mpc_name = | |||
| | pronounced = | |||
| | named_after = | |||
| | alt_names = | |||
| | mp_category = | |||
| | adjectives = | |||
| <!-- ORBITAL --> | |||
| | orbit_ref = | |||
| | orbit_diagram = | |||
| | epoch = | |||
| | uncertainty = | |||
| | observation_arc = | |||
| | earliest_precovery_date = | |||
| | apsis = astron | |||
| | aphelion = | |||
| | perihelion = | |||
| | semimajor = {{convert|0.995 ± 0.012|AU|km|abbr=on}} | |||
| | mean_orbit_radius = | |||
| | eccentricity = 0.289 ± 0.092 | |||
| | period = 335.1 ± 2.5 ]<br>0.917 ± 0.007 ] | |||
| | synodic_period = | |||
| | avg_speed = | |||
| | mean_anomaly = | |||
| | mean_motion = | |||
| | inclination =4.14+0.96−0.90°<ref name="Kiefer2020" /> | |||
| | angular_dist = | |||
| | asc_node = | |||
| | long_periastron = | |||
| | time_periastron = | |||
| | arg_peri = | |||
| | semi-amplitude = | |||
| | satellite_of = | |||
| | satellites = | |||
| | star = | |||
| | allsatellites = | |||
| | tisserand = | |||
| <!-- PHYS CHARS --> | |||
| | physical_ref = | |||
| | dimensions = | |||
| | mean_diameter = | |||
| | mean_radius = | |||
| | equatorial_radius = | |||
| | polar_radius = | |||
| | flattening = | |||
| | circumference = | |||
| | surface_area = | |||
| | volume = | |||
| | mass = | |||
| | density = | |||
| | surface_grav = | |||
| | moment_of_inertia_factor = | |||
| | escape_velocity = | |||
| | rotation = | |||
| | sidereal_day = | |||
| | rot_velocity = | |||
| | axial_tilt = | |||
| | right_asc_north_pole = | |||
| | declination = | |||
| | pole_ecliptic_lat = | |||
| | pole_ecliptic_lon = | |||
| | albedo = | |||
| | single_temperature = | |||
| | spectral_type = | |||
| | magnitude = | |||
| | abs_magnitude = | |||
| | angular_size = | |||
| | family = | |||
| <!-- ATMOSPHERE --> | |||
| | atmosphere_ref = | |||
| | atmosphere = | |||
| | scale_height = | |||
| | surface_pressure = | |||
| | atmosphere_composition = | |||
| <!-- NOTES --> | |||
| | note = | |||
| }} | |||
| '''30 Arietis Bb''' (sometimes abbreviated '''30 Ari Bb''') is a ] which orbits the ] ] ] ], located in a quintuple star system approximately 146 ]s away in the ] ]. The ] was discovered by on Friday, November 27, 2009 by using precise ] from ] installed in the ] in ].<ref name="Guenther2009">{{cite journal |last=Guenther |first=E. W. |display-authors=etal |date=2009 |url=http://www.aanda.org/articles/aa/full_html/2009/45/aa12112-09/aa12112-09.html |title=A substellar component orbiting the F-star 30 Arietis B |journal=Astronomy and Astrophysics|volume=507 |issue=3 |pages=1659–1665 |arxiv=0912.4619 |bibcode=2009A&A...507.1659G |doi=10.1051/0004-6361/200912112}}</ref> The star had a ] of nearly 10 times that of ].<ref>{{cite web |url=http://exoplanet.eu/planet.php?p1=30+Ari+B&p2=b |title=Notes for Planet 30 Ari B b |author=Jean Schneider |year=2011 |publisher=] |access-date=3 October 2011}}</ref> In 2020, after the inclination of the planetary orbit was measured to be just 4.14{{±|0.96|0.90}}°, the "planet" was found to fall in the mass range of the red dwarf star.<ref name="Kiefer2020">{{citation|arxiv=2009.14164|title=Determining the true mass of radial-velocity exoplanets with Gaia 9 planet candidates in the brown-dwarf/stellar regime and 27 confirmed planets|year=2021|doi=10.1051/0004-6361/202039168|last1=Kiefer|first1=Flavien|last2=Hébrard|first2=Guillaume|last3=Lecavelier|first3=Alain|last4=Martioli|first4=Eder|last5=Dalal|first5=Shweta|last6=Vidal-Madjar|first6=Alfred|journal=Astronomy & Astrophysics|volume=A7|page=645|s2cid=221995447}}</ref> | |||
| ] | |||
| ==References== | |||
| ] | |||
| {{Reflist}}{{Aries (constellation)}} | |||
| {{Sky|02|36|57.7405|+|24|38|53.027|128.6}} | |||
| {{red-dwarf-stub}} | |||
| ] | |||
| ] | |||
| ] | |||
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