| 词条 | 23 Librae b |
| 释义 |
| name = 23 Librae b | symbol = | image = | image_size = | image_alt = | caption = | background = | bgcolour = | label_width = | discoverer = Vogt et al.[1] | discovery_site = Keck Observatory[2] | discovered = November 1, 1999[2] | discovery_method = Radial velocity | discovery_ref = | exosolar planets = | minorplanet = | extrasolarplanet = | mpc_name = | pronounced = | named_after = | alt_names = | mp_category = | adjectives = | orbit_ref = | orbit_diagram = | epoch = | uncertainty = | observation_arc = | earliest_precovery_date = | apsis = astron | aphelion = | perihelion = | semimajor = {{convert|0.81 ± 0.02|AU|km|abbr=on}} | mean_orbit_radius = | eccentricity = 0.233 ± 0.002 | period = 258.19 ± 0.07 d 0.7069 y | synodic_period = | avg_speed = | mean_anomaly = | mean_motion = | inclination = | angular_dist = | asc_node = | long_periastron = | time_periastron = 2,450,331.7 ± 2.2 | arg_peri = 358.3 ± 3.7 | semi-amplitude = 49.52 ± 0.57 | satellite_of = | satellites = | star = | allsatellites = | tisserand = | 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_ref = | atmosphere = | scale_height = | surface_pressure = | atmosphere_composition = | note = }}23 Librae b (23 Lib b) is an extrasolar Jovian planet discovered in November 1999 orbiting the star 23 Librae. It orbits in its star's habitable zone.[2][1] As of 1999, the planet was known to have at least 1.5 times Jupiter's mass. The planet orbits 23 Librae at an average distance of 0.82 AUs, which is between that of Venus and the Earth in the Solar System.[7] References1. ^1 {{cite journal | title=A long-period planet orbiting a nearby Sun-like star | url=http://mnras.oxfordjournals.org/content/403/4/1703.full | last1=Jones | first1=Hugh R. A. | last2=Butler | first2=R. Paul | last3=Tinney | first3=C. G. | last4=O'Toole | first4=Simon | last5=Wittenmyer | first5=Rob | last6=Henry | first6=Gregory W. | last7=Meschiari | first7=Stefano | last8=Vogt | first8=Steve | last9=Rivera | first9=Eugenio | last10=Laughlin | first10=Greg | last11=Carter | first11=Brad D. | last12=Bailey | first12=Jeremy | last13=Jenkins | first13=James S. | display-authors=1 | journal=Monthly Notices of the Royal Astronomical Society | volume=403 | issue=4 | pages=1703–1713 | year=2010 | arxiv=0912.2716 | bibcode=2010MNRAS.403.1703J | doi=10.1111/j.1365-2966.2009.16232.x }} [1][2][3]2. ^1 2 3 {{cite press release | title=Astronomers discover six new planets orbiting nearby stars | date=November 1, 1999 | publisher=W. M. Keck Observatory | location=Kamuela, Hawaii | url=http://www.keckobservatory.org/astronomers_discover_six_new_planets_orbiting_nearby_stars/ | accessdate=December 19, 2017 }} 3. ^1 2 {{cite journal | title=Six New Planets from the Keck Precision Velocity Survey | last1=Vogt | first1=Steven S. | last2=Marcy | first2=Geoffrey W. | last3=Butler | first3=R. Paul | last4=Apps | first4=Kevin | display-authors=1 | journal=The Astrophysical Journal | volume=536 | issue=2 | pages=902–914 | year=2000 | arxiv=astro-ph/9911506 | bibcode=2000ApJ...536..902V | doi=10.1086/308981 }} }}{{Sky|15|13|28|-|25|18|33|83.7}}{{23 Librae}}{{extrasolar-planet-stub}} 4 : Libra (constellation)|Exoplanets detected by radial velocity|Exoplanets discovered in 1999|Giant planets in the habitable zone |
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