 Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | 27 September 1873 |
| Designations | |
| (134) Sophrosyne | |
| Pronunciation | /soʊˈfrɒsɪniː/ [1] |
Named after | sophrosyne |
| Main belt | |
| Orbital characteristics [2] | |
| Epoch 31 July 2016 ( JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 138.60 yr (50625 d) |
| Aphelion | 2.86280 AU (428.269 Gm) |
| Perihelion | 2.26311 AU (338.556 Gm) |
| 2.56295 AU (383.412 Gm) | |
| Eccentricity | 0.11699 |
| 4.10 yr (1498.7 d) | |
Average
orbital speed | 18.54 km/s |
| 229.885 ° | |
| 0° 14m 24.76s / day | |
| Inclination | 11.6018° |
| 345.986° | |
| 84.7156° | |
| Earth MOID | 1.31034 AU (196.024 Gm) |
| Jupiter MOID | 2.42537 AU (362.830 Gm) |
| TJupiter | 3.396 |
| Physical characteristics | |
Mean diameter | 108
[2] 112.188 km [3] |
| Mass | (1.267 ± 0.575/0.398)×1018 kg [4] |
Mean
density | 1.713 ± 0.778/0.538 g/cm3 [4] |
Equatorial
surface gravity | 0.029 m/s2 |
Equatorial
escape velocity | 0.056 km/s |
| 17.190 h (0.7163 d) [5] | |
| 0.0364±0.001
[2] 0.0436 ± 0.0122 [3] | |
| Temperature | ~174 K |
| C ( Tholen) [3] | |
| 9.04, [2] 8.770 [3] | |
Sophrosyne ( minor planet designation: 134 Sophrosyne) is a large main-belt asteroid that was discovered by German astronomer Robert Luther on 27 September 1873, and was named after the concept of sophrosyne, Plato's term for 'moderation'. Classified as a C-type asteroid, it has an exceedingly dark surface and most probably a primitive carbonaceous composition.[ citation needed]
An occultation of a star by 134 Sophrosyne was observed 24 November 1980, in the United States. Timing information from this event allowed a diameter estimate of 110 km to be derived. [6] Photometric observations of the asteroid in 2015 produced a lightcurve indicating a rotation period of 17.190±0.001 h with a variation amplitude of 0.28±0.01 in magnitude. This provided a good match to the only previous determination in 1989. [5]
References
- ^ Noah Webster (1884) A Practical Dictionary of the English Language
- ^ a b c d Yeomans, Donald K., "134 Sophrosyne", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ a b c d Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667, Bibcode: 2012LPICo1667.6089P.
- ^ a b Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1). doi: 10.1093/mnras/stz3407.
- ^ a b Pilcher, Frederick (October 2015), "Rotation Period Determination for 134 Sophrosyne, 521 Brixia and 873 Mechthild", The Minor Planet Bulletin, 42 (4): 280–281, Bibcode: 2015MPBu...42..280P.
- ^ Taylor, G. E., "Progress in accurate determinations of diameters of minor planets", Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, June 20–22, 1983, pp. 107–109, Bibcode: 1983acm..proc..107T.
External links
- 134 Sophrosyne at AstDyS-2, Asteroids—Dynamic Site
- 134 Sophrosyne at the JPL Small-Body Database
_mathilde.jpg){kind=small} | This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |
|
Orbital diagram | |
| Discovery | |
|---|---|
| Discovered by | Karl Theodor Robert Luther |
| Discovery date | 27 September 1873 |
| Designations | |
| (134) Sophrosyne | |
| Pronunciation | /soʊˈfrɒsɪniː/ [1] |
Named after | sophrosyne |
| Main belt | |
| Orbital characteristics [2] | |
| Epoch 31 July 2016 ( JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 138.60 yr (50625 d) |
| Aphelion | 2.86280 AU (428.269 Gm) |
| Perihelion | 2.26311 AU (338.556 Gm) |
| 2.56295 AU (383.412 Gm) | |
| Eccentricity | 0.11699 |
| 4.10 yr (1498.7 d) | |
Average
orbital speed | 18.54 km/s |
| 229.885 ° | |
| 0° 14m 24.76s / day | |
| Inclination | 11.6018° |
| 345.986° | |
| 84.7156° | |
| Earth MOID | 1.31034 AU (196.024 Gm) |
| Jupiter MOID | 2.42537 AU (362.830 Gm) |
| TJupiter | 3.396 |
| Physical characteristics | |
Mean diameter | 108
[2] 112.188 km [3] |
| Mass | (1.267 ± 0.575/0.398)×1018 kg [4] |
Mean
density | 1.713 ± 0.778/0.538 g/cm3 [4] |
Equatorial
surface gravity | 0.029 m/s2 |
Equatorial
escape velocity | 0.056 km/s |
| 17.190 h (0.7163 d) [5] | |
| 0.0364±0.001
[2] 0.0436 ± 0.0122 [3] | |
| Temperature | ~174 K |
| C ( Tholen) [3] | |
| 9.04, [2] 8.770 [3] | |
Sophrosyne ( minor planet designation: 134 Sophrosyne) is a large main-belt asteroid that was discovered by German astronomer Robert Luther on 27 September 1873, and was named after the concept of sophrosyne, Plato's term for 'moderation'. Classified as a C-type asteroid, it has an exceedingly dark surface and most probably a primitive carbonaceous composition.[ citation needed]
An occultation of a star by 134 Sophrosyne was observed 24 November 1980, in the United States. Timing information from this event allowed a diameter estimate of 110 km to be derived. [6] Photometric observations of the asteroid in 2015 produced a lightcurve indicating a rotation period of 17.190±0.001 h with a variation amplitude of 0.28±0.01 in magnitude. This provided a good match to the only previous determination in 1989. [5]
References
- ^ Noah Webster (1884) A Practical Dictionary of the English Language
- ^ a b c d Yeomans, Donald K., "134 Sophrosyne", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
- ^ a b c d Pravec, P.; et al. (May 2012), "Absolute Magnitudes of Asteroids and a Revision of Asteroid Albedo Estimates from WISE Thermal Observations", Asteroids, Comets, Meteors 2012, Proceedings of the conference held May 16–20, 2012 in Niigata, Japan, no. 1667, Bibcode: 2012LPICo1667.6089P.
- ^ a b Fienga, A.; Avdellidou, C.; Hanuš, J. (February 2020). "Asteroid masses obtained with INPOP planetary ephemerides". Monthly Notices of the Royal Astronomical Society. 492 (1). doi: 10.1093/mnras/stz3407.
- ^ a b Pilcher, Frederick (October 2015), "Rotation Period Determination for 134 Sophrosyne, 521 Brixia and 873 Mechthild", The Minor Planet Bulletin, 42 (4): 280–281, Bibcode: 2015MPBu...42..280P.
- ^ Taylor, G. E., "Progress in accurate determinations of diameters of minor planets", Asteroids, comets, meteors; Proceedings of the Meeting, Uppsala, Sweden, June 20–22, 1983, pp. 107–109, Bibcode: 1983acm..proc..107T.
External links
- 134 Sophrosyne at AstDyS-2, Asteroids—Dynamic Site
- 134 Sophrosyne at the JPL Small-Body Database
|
| This article about a C-type asteroid native to the asteroid belt is a stub. You can help Wikipedia by expanding it. |