2146 Stentor
| Discovery [1] | |
|---|---|
| Discovered by | R. M. West |
| Discovery site | La Silla Obs. |
| Discovery date | 24 October 1976 |
| Designations | |
| MPC designation | (2146) Stentor |
| Pronunciation | /ˈstɛntɔːr/ · STEN-tor |
Named after |
Stentor (Greek mythology) [1] |
| 1976 UQ | |
|
Jupiter trojan [1][2] Greek [3] · background [4] | |
| Orbital characteristics [2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 40.93 yr (14,949 d) |
| Aphelion | 5.7217 AU |
| Perihelion | 4.6714 AU |
| 5.1965 AU | |
| Eccentricity | 0.1011 |
| 11.85 yr (4,327 d) | |
| 238.48° | |
| 0° 4m 59.52s / day | |
| Inclination | 39.261° |
| 131.32° | |
| 273.11° | |
| Jupiter MOID | 0.0831 AU |
| TJupiter | 2.5410 |
| Physical characteristics | |
Mean diameter |
50.76±0.33 km[5] 58.29 km (calculated)[6] |
| 16.40±0.02 h[7][lower-alpha 1] | |
|
0.057 (assumed)[6] 0.082±0.011[5] | |
| C (assumed)[6] | |
|
9.8[5] 9.9[1][2][6] | |
|
| |
2146 Stentor (/ˈstɛntɔːr/ STEN-tor), provisional designation 1976 UQ, is a Jupiter trojan from the Greek camp, approximately 51 kilometers (32 miles) in diameter. It was discovered on 24 October 1976, by Danish astronomer Richard Martin West at the ESO's La Silla Observatory in Chile.[1] The dark Jovian asteroid has a rotation period of 16.4 hours and belongs to the 100 largest Jupiter trojans.[6] It was named after Stentor from Greek mythology, a Herald of the Greeks during the Trojan War.[1]
Orbit and classification
Stentor is a Jovian asteroid orbiting in the leading Greek camp at Jupiter's L4 Lagrangian point, 60° ahead of the gas giant's orbit in a 1:1 resonance .[3] It is a non-family asteroid in the Jovian background population.[4]
It orbits the Sun at a distance of 4.7–5.7 AU once every 11 years and 10 months (4,327 days; semi-major axis of 5.2 AU). Its orbit has an eccentricity of 0.10 and an inclination of 39° with respect to the ecliptic.[2] The body's observation arc begins with its official discovery observation at La Silla in October 1976.[1]
Physical characteristics
Stentor is an assumed C-type asteroid.[6]
Rotation period
In June 2016, a rotational lightcurve of Stentor was obtained from photometric observations by Brian Warner at the Center for Solar System Studies (CS3) in California. Lightcurve analysis gave a rotation period of 16.40±0.02 hours with a brightness amplitude of 0.10 magnitude (U=2). An alternative period solution (1:1.5 alias of 24.88 was also obtained.[6][7][lower-alpha 1]
Stentor was previously observed at CS3 by Daniel Coley and Robert Stephens in February 2013, gave an alternative period solution of 35.14±0.02 hours with an amplitude of 0.09 magnitude. This approximately a 1:2 alias is now superseded by the shorter period above (U=2).[8]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Stentor measures 50.76 kilometers in diameter and its surface has an albedo 0.082,[5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 58.29 kilometers based on an absolute magnitude of 9.9.[6]
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Naming
This minor planet was named from Greek mythology after Stentor, the Greek warrior and herald with a voice as loud as fifty men together.[1] The official naming citation was published by the Minor Planet Center before November 1977 (M.P.C. 4788).[9]
Notes
References
- 1 2 3 4 5 6 7 8 "2146 Stentor (1976 UQ)". Minor Planet Center. Retrieved 19 June 2018.
- 1 2 3 4 "JPL Small-Body Database Browser: 2146 Stentor (1976 UQ)" (2017-09-28 last obs.). Jet Propulsion Laboratory. Retrieved 19 June 2018.
- 1 2 "List of Jupiter Trojans". Minor Planet Center. 1 June 2018. Retrieved 19 June 2018.
- 1 2 "Asteroid (2146) Stentor – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 19 June 2018.
- 1 2 3 4 Grav, T.; Mainzer, A. K.; Bauer, J. M.; Masiero, J. R.; Nugent, C. R. (November 2012). "WISE/NEOWISE Observations of the Jovian Trojan Population: Taxonomy". The Astrophysical Journal. 759 (1): 10. arXiv:1209.1549. Bibcode:2012ApJ...759...49G. doi:10.1088/0004-637X/759/1/49. Retrieved 19 June 2018. (online catalog)
- 1 2 3 4 5 6 7 8 "LCDB Data for (2146) Stentor". Asteroid Lightcurve Database (LCDB). Retrieved 19 June 2018.
- 1 2 Stephens, Robert D.; Coley, Daniel R.; Warner, Brian D.; French, Linda, M. (October 2016). "Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies". The Minor Planet Bulletin. 43 (4): 323–331. Bibcode:2016MPBu...43..323S. ISSN 1052-8091. Retrieved 19 June 2018.
- ↑ French, Linda M.; Stephens, Robert, D.; Coley, Daniel R.; Wasserman, Lawrence H.; Vilas, Faith; La Rocca, Daniel (October 2013). "A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids". The Minor Planet Bulletin. 40 (4): 198–203. Bibcode:2013MPBu...40..198F. ISSN 1052-8091. Retrieved 19 June 2018.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 19 June 2018.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Small Bodies Data Ferret at the Asteroid 2146 Stentor
- 2146 Stentor at AstDyS-2, Asteroids—Dynamic Site
- 2146 Stentor at the JPL Small-Body Database
