Mu Arae e
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | Mu Arae | |
| Constellation | Ara | |
| Right ascension | (α) | 17h 44m 08.7s |
| Declination | (δ) | −51° 50′ 03″ |
| Apparent magnitude | (mV) | 5.15 |
| Distance | 50.6 ± 0.2 ly (15.51 ± 0.07 pc) |
|
| Spectral type | G3IV–V | |
| Mass | (m) | 1.10 ± 0.01 M☉ |
| Radius | (r) | 1.36 ± 0.01 R☉ |
| Temperature | (T) | 5820 ± 40 K |
| Metallicity | [Fe/H] | 0.30 ± 0.01 |
| Age | 6.34 ± 0.40 Gyr | |
| Orbital elements | ||
| Semi-major axis | (a) | 5.235AU (783.1 Gm) |
| Periastron | (q) | 4.719 AU (705.9 Gm) |
| Apastron | (Q) | 5.750 AU (860.3 Gm) |
| Eccentricity | (e) | 0.0985 ± 0.0627 |
| Orbital period | (P) | 4205.8 ± 758.9d (11.51 y) |
| Argument of periastron |
(ω) | 57.6 ± 43.7° |
| Time of periastron | (T0) | 2,450,541 ± 96JD |
| Semi-amplitude | (K) | 18.1 ± 1.1m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.814MJ (576 M⊕) |
| Discovery information | ||
| Discovery date | June 13, 2002 | |
| Discoverer(s) | Butler, Marcy | |
| Discovery method | Radial velocity | |
| Discovery site |
California,  USA
|
|
| Discovery status | Published | |
| Other designations | ||
|
HD 160691 e, Sancho
|
||
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
Mu Arae e, also known as HD 160691 e, later named Sancho, is one of the four extrasolar planets orbiting the star Mu Arae of the constellation Ara.
In July 2014 the International Astronomical Union launched a process for giving proper names to certain exoplanets and their host stars. The process involved public nomination and voting for the new names. In December 2015, the IAU announced the winning name was Sancho for this planet. The winning name was submitted by the Planetario de Pamplona, Spain. Sancho was the squire of the lead character of the novel El Ingenioso Hidalgo Don Quixote de la Mancha.
The planet's discovery was announced on June 13, 2002. Mu Arae e is a gas giant at least 1.8 times as massive as Jupiter. The planet orbits at Jupiter-like distance at 5.235 AU.
Coordinates: 
17h 44m 08.7s, −51° 50′ 03″
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