Discovery [1] | |
---|---|
Discovered by | Y. Väisälä |
Discovery site | Turku Obs. |
Discovery date | 12 September 1936 |
Designations | |
(1405) Sibelius | |
Named after |
Jean Sibelius (Finnish composer) [2] |
1936 RE · 1951 CO 1953 VK3 · 1963 ST | |
main-belt · Flora [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 66.40 yr (24,254 days) |
Aphelion | 2.5817 AU |
Perihelion | 1.9215 AU |
2.2516 AU | |
Eccentricity | 0.1466 |
3.38 yr (1,234 days) | |
312.34 ° | |
0° 17m 30.12s / day | |
Inclination | 7.0301° |
312.08° | |
95.795° | |
Physical characteristics | |
Dimensions | 6.21±0.35 km
[4] 6.810±0.098 km [5] 7.175±0.089 km [6] 7.20 km (taken) [3] 7.204 km [7] 9.26±1.95 km [8] 12.18±1.1 km [9] |
6.051±0.001 h [a] [b] | |
0.1432±0.029
[9] 0.27±0.15 [8] 0.3191 [7] 0.3516±0.0646 [6] 0.388±0.040 [5] 0.458±0.068 [4] | |
S [3] [10] | |
12.03 (R) [a] · 12.3 [9] · 12.48 [6] · 12.5 [1] [4] [8] · 12.57±0.078 [3] [7] · 12.57±0.33 [10] | |
1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. [11] The asteroid was named after composer Jean Sibelius. [2]
Sibelius is a member of the Flora family, one of the largest populations of stony asteroids in the entire main-belt. It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 5 months (1,234 days). Its orbit has an eccentricity of 0.15 and an inclination of 7 ° with respect to the ecliptic. [1] The body's observation arc begins with an observation taken at Turku two weeks prior to its official discovery observation. [11]
Sibelius has been characterized as an S-type asteroid by Pan-STARRS photometric survey. [10]
In October 2007, a rotational lightcurve of Sibelius was obtained from photometric observations taken by Petr Pravec at the Ondřejov Observatory in the Czech Republic. Lightcurve analysis gave a rotation period of 6.051 hours with a brightness variation of 0.11 magnitude ( U=3-). [a] [b]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, Sibelius measures between 6.21 and 12.18 kilometers in diameter and its surface has an albedo between 0.14 and 0.48. [4] [5] [6] [8] [9] The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.3191 and a diameter of 7.20 kilometers from Petr Pravec's revised WISE thermal observations. [3] [7]
This minor planet was named for Jean Sibelius (1865–1957), Finnish violinist and composer of the late Romantic and early-modern periods. [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3928). [12]
Discovery [1] | |
---|---|
Discovered by | Y. Väisälä |
Discovery site | Turku Obs. |
Discovery date | 12 September 1936 |
Designations | |
(1405) Sibelius | |
Named after |
Jean Sibelius (Finnish composer) [2] |
1936 RE · 1951 CO 1953 VK3 · 1963 ST | |
main-belt · Flora [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 66.40 yr (24,254 days) |
Aphelion | 2.5817 AU |
Perihelion | 1.9215 AU |
2.2516 AU | |
Eccentricity | 0.1466 |
3.38 yr (1,234 days) | |
312.34 ° | |
0° 17m 30.12s / day | |
Inclination | 7.0301° |
312.08° | |
95.795° | |
Physical characteristics | |
Dimensions | 6.21±0.35 km
[4] 6.810±0.098 km [5] 7.175±0.089 km [6] 7.20 km (taken) [3] 7.204 km [7] 9.26±1.95 km [8] 12.18±1.1 km [9] |
6.051±0.001 h [a] [b] | |
0.1432±0.029
[9] 0.27±0.15 [8] 0.3191 [7] 0.3516±0.0646 [6] 0.388±0.040 [5] 0.458±0.068 [4] | |
S [3] [10] | |
12.03 (R) [a] · 12.3 [9] · 12.48 [6] · 12.5 [1] [4] [8] · 12.57±0.078 [3] [7] · 12.57±0.33 [10] | |
1405 Sibelius, provisional designation 1936 RE, is a stony Florian asteroid from the inner regions of the asteroid belt, approximately 8 kilometers in diameter. It was discovered on 12 September 1936, by Finnish astronomer Yrjö Väisälä at Turku Observatory in Southwest Finland. [11] The asteroid was named after composer Jean Sibelius. [2]
Sibelius is a member of the Flora family, one of the largest populations of stony asteroids in the entire main-belt. It orbits the Sun in the inner main-belt at a distance of 1.9–2.6 AU once every 3 years and 5 months (1,234 days). Its orbit has an eccentricity of 0.15 and an inclination of 7 ° with respect to the ecliptic. [1] The body's observation arc begins with an observation taken at Turku two weeks prior to its official discovery observation. [11]
Sibelius has been characterized as an S-type asteroid by Pan-STARRS photometric survey. [10]
In October 2007, a rotational lightcurve of Sibelius was obtained from photometric observations taken by Petr Pravec at the Ondřejov Observatory in the Czech Republic. Lightcurve analysis gave a rotation period of 6.051 hours with a brightness variation of 0.11 magnitude ( U=3-). [a] [b]
According to the surveys carried out by the Infrared Astronomical Satellite IRAS and NASA's Wide-field Infrared Survey Explorer (WISE) with its subsequent NEOWISE mission, Sibelius measures between 6.21 and 12.18 kilometers in diameter and its surface has an albedo between 0.14 and 0.48. [4] [5] [6] [8] [9] The Collaborative Asteroid Lightcurve Link adopts an albedo of 0.3191 and a diameter of 7.20 kilometers from Petr Pravec's revised WISE thermal observations. [3] [7]
This minor planet was named for Jean Sibelius (1865–1957), Finnish violinist and composer of the late Romantic and early-modern periods. [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3928). [12]