1006 Lagrangea
| Discovery[1] | |
|---|---|
| Discovered by | S. Belyavskyj |
| Discovery site | Simeiz Obs. |
| Discovery date | 12 September 1923 |
| Designations | |
| (1006) Lagrangea | |
| Pronunciation | /ləˈɡrɒndʒiə/[2] |
Named after | Joseph-Louis Lagrange (Italian astronomer)[3] |
| 1923 OU | |
| main-belt · (outer)[4] | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 93.73 yr (34,235 days) |
| Aphelion | 4.2641 AU |
| Perihelion | 2.0210 AU |
| 3.1425 AU | |
| Eccentricity | 0.3569 |
| 5.57 yr (2,035 days) | |
| 283.17° | |
| 0° 10m 36.84s / day | |
| Inclination | 10.917° |
| 294.59° | |
| 86.231° | |
| Physical characteristics | |
| Dimensions | 29.53 km (derived)[4] 29.56±2.3 km[5] 30.36±6.84 km[6] 32.24±1.16 km[7] 35.310±0.345 km[8][9] |
| 32.79±0.06 h[10] | |
| 0.046±0.006[8] 0.0469±0.0064[9] 0.058±0.005[7] 0.06±0.03[6] 0.0612 (derived)[4] 0.0670±0.012[5] | |
| D[11] · C[4] | |
| 11.20[5][7][9] · 11.30[1][4][6] · 11.36±0.19[11] | |
Lagrangea (minor planet designation: 1006 Lagrangea), provisional designation 1923 OU, is a carbonaceous background asteroid from the outer region of the asteroid belt, approximately 30 kilometers in diameter. It was discovered on 12 September 1923, by Russian astronomer Sergey Belyavsky at the Simeiz Observatory on the Crimean peninsula.[12] The asteroid was named after Italian mathematician and astronomer Joseph-Louis Lagrange.[3]
Orbit and classification
[edit | edit source]Lagrangea is not a member of any known asteroid family. It orbits the Sun in the outer main belt at a distance of 2.0–4.3 AU once every 5 years and 7 months (2,035 days). Its orbit has an eccentricity of 0.36 and an inclination of 11° with respect to the ecliptic.[1] The body's observation arc begins at the discovering observatory, 4 days after its official discovery observation.[12]
Physical characteristics
[edit | edit source]Lagrangea has been characterized as a dark D-type asteroid by Pan-STARRS photometric survey, while the LCDB assumes a generic, carbonaceous C-type.[4][11]
Rotation period
[edit | edit source]In September 2001, a rotational lightcurve of Lagrangea was obtained from photometric observations by French amateur astronomer Laurent Bernasconi. Lightcurve analysis gave a longer-than-average rotation period of 32.79 hours with a brightness amplitude of 0.17 magnitude.[10] As the lightcurve has received a low quality rating, the obtained period must be considered tentative (U=1).[4]
Diameter and albedo
[edit | edit source]According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Lagrangea measures between 29.56 and 35.31 kilometers in diameter and its surface has an albedo between 0.046 and 0.067.[5][6][7][8][9]
The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0612 and a diameter of 29.53 kilometers based on an absolute magnitude of 11.3.[4]
Naming
[edit | edit source]This minor planet was named after Italian mathematician Joseph-Louis Lagrange (1736–1813), who made significant contributions to astronomy, in particular celestial mechanics. The official naming citation was mentioned in The Names of the Minor Planets by Paul Herget in 1955 (H 96). The Lagrangian points are named after him. He is also honored by the lunar crater Lagrange.[3]
References
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- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (Subscription or participating institution membership required.)
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
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- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). (online, AcuA catalog p. 153)
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- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
External links
[edit | edit source]- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 1006 Lagrangea at AstDyS-2, Asteroids—Dynamic Site
- 1006 Lagrangea at the JPL Small-Body DatabaseLua error in Module:EditAtWikidata at line 29: attempt to index field 'wikibase' (a nil value).
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