Discovery [1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 7 March 1924 |
Designations | |
(1704) Wachmann | |
Named after |
Arno Wachmann (German astronomer) [2] |
A924 EE · 1947 CE 1957 BJ | |
main-belt · ( inner) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 93.16 yr (34,026 days) |
Aphelion | 2.4163 AU |
Perihelion | 2.0292 AU |
2.2228 AU | |
Eccentricity | 0.0871 |
3.31 yr (1,210 days) | |
67.047 ° | |
0° 17m 50.64s / day | |
Inclination | 0.9715° |
259.47° | |
280.77° | |
Physical characteristics | |
Dimensions | 6.618±0.070
[4] 6.934±0.070 km [5] 7.82 km (calculated) [3] |
3.314±0.001 h [6] | |
0.1767±0.0133
[5] 0.193±0.036 [4] 0.20 (assumed) [3] | |
S [3] | |
12.9 [1] [3] · 12.97±0.13 [7] · 13.3 [5] | |
1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924. It was later named after astronomer Arno Wachmann. [2] [8]
The S-type asteroid orbits the Sun in the inner main-belt at a distance of 2.0–2.4 AU once every 3 years and 4 months (1,210 days). Its orbit has an eccentricity of 0.09 and an inclination of 1 ° with respect to the ecliptic. [1] No precoveries were taken. The asteroid's observation arc begins 3 days after its official discovery observation. [8]
In April 2007, a rotational lightcurve Wachmann was obtained at the U.S. Sandia View Observatory in New Mexico ( H03). Lightcurve analysis gave a well-defined rotation period of 3.314±0.001 hours with a brightness variation of 0.40 magnitude ( U=3). [6]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Wachmann measures 6.6 and 6.9 kilometers in diameter, and its surface has an albedo of 0.177 and 0.193, respectively, [4] [5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 7.8 kilometers, based on an absolute magnitude of 12.9. [3]
This minor planet was named for Arno Wachmann (1902–1990), long-time astronomer at the Bergedorf Observatory in Hamburg, discoverer of minor planets and comets, and observer of variable and binary stars. He is best known for the co-discovery of the three "Schwassmann–Wachmann" comets, 29P, 31P and 73P. [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3933). [9]
Discovery [1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 7 March 1924 |
Designations | |
(1704) Wachmann | |
Named after |
Arno Wachmann (German astronomer) [2] |
A924 EE · 1947 CE 1957 BJ | |
main-belt · ( inner) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 93.16 yr (34,026 days) |
Aphelion | 2.4163 AU |
Perihelion | 2.0292 AU |
2.2228 AU | |
Eccentricity | 0.0871 |
3.31 yr (1,210 days) | |
67.047 ° | |
0° 17m 50.64s / day | |
Inclination | 0.9715° |
259.47° | |
280.77° | |
Physical characteristics | |
Dimensions | 6.618±0.070
[4] 6.934±0.070 km [5] 7.82 km (calculated) [3] |
3.314±0.001 h [6] | |
0.1767±0.0133
[5] 0.193±0.036 [4] 0.20 (assumed) [3] | |
S [3] | |
12.9 [1] [3] · 12.97±0.13 [7] · 13.3 [5] | |
1704 Wachmann, provisional designation A924 EE, is a stony asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory on 7 March 1924. It was later named after astronomer Arno Wachmann. [2] [8]
The S-type asteroid orbits the Sun in the inner main-belt at a distance of 2.0–2.4 AU once every 3 years and 4 months (1,210 days). Its orbit has an eccentricity of 0.09 and an inclination of 1 ° with respect to the ecliptic. [1] No precoveries were taken. The asteroid's observation arc begins 3 days after its official discovery observation. [8]
In April 2007, a rotational lightcurve Wachmann was obtained at the U.S. Sandia View Observatory in New Mexico ( H03). Lightcurve analysis gave a well-defined rotation period of 3.314±0.001 hours with a brightness variation of 0.40 magnitude ( U=3). [6]
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Wachmann measures 6.6 and 6.9 kilometers in diameter, and its surface has an albedo of 0.177 and 0.193, respectively, [4] [5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 7.8 kilometers, based on an absolute magnitude of 12.9. [3]
This minor planet was named for Arno Wachmann (1902–1990), long-time astronomer at the Bergedorf Observatory in Hamburg, discoverer of minor planets and comets, and observer of variable and binary stars. He is best known for the co-discovery of the three "Schwassmann–Wachmann" comets, 29P, 31P and 73P. [2] The official naming citation was published by the Minor Planet Center on 20 February 1976 ( M.P.C. 3933). [9]