FANDOM


11 Ursae Minoris b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>11 Ursae Minoris</td></tr><tr> <td colspan="2">Constellation</td> <td>Ursa Minor</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>15h 17m 05.89s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+71° 49′ 26.0″[1]</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>5.024</td></tr><tr><td colspan="2">Distance</td><td>398 ± 9[1] ly
(122 ± 3[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>K4III</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.54 ± 0.07 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.42 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>1.66 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.08 ± 0.03</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>516.22 ± 3.25 d
(1.4133 ± 0.0089 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>117.63 ± 21.06°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452861.05 ± 2.06 JD</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>10.5 ± 2.47 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>August 12, 2009</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Döllinger et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>TLS</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
HD 136726 b, HIP 74793 b, HR 5714 b

<tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
Encyclopaedia
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

11 Ursae Minoris b is an extrasolar planet which orbits the K-type giant star 11 Ursae Minoris, located approximately 390 light years away in the constellation Ursa Minor. This planet has mass 10.5 MJ. However, since the mass is at lower limit and since inclination is not known, the actual mass is unknown. This planet may actually be a brown dwarf if a true mass is over 13 times that of Jupiter. This planet takes 17 months to orbit the star at the average distance of 1.54 AU in a circular orbit. This superjovian planet was detected by radial velocity method on August 12, 2009.[2]

References Edit

  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664. Vizier catalog entry
  2. (2009). Planetary companions around the K giant stars 11 Ursae Minoris and HD 32518. Astronomy and Astrophysics 505 (3): 1311–1317.

Coordinates: Sky map 15h 17m 05.8886s, +71° 49′ 26.044″


Ad blocker interference detected!


Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.