Discovery [1] | |
---|---|
Discovered by |
Indiana University ( Indiana Asteroid Program) |
Discovery site | Goethe Link Obs. |
Discovery date | 16 September 1952 |
Designations | |
(2023) Asaph | |
Named after |
Asaph Hall (American astronomer) [2] |
1952 SA | |
main-belt · ( outer) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 64.53 yr (23,571 days) |
Aphelion | 3.6816 AU |
Perihelion | 2.0703 AU |
2.8760 AU | |
Eccentricity | 0.2801 |
4.88 yr (1,781 days) | |
98.697 ° | |
0° 12m 7.56s / day | |
Inclination | 22.352° |
3.1290° | |
357.53° | |
Physical characteristics | |
Dimensions | 19.678±0.264 km
[4]
[5] 20.56±0.43 km [6] 21.29±0.40 km [7] 25.44 km (calculated) [3] |
3.87±0.02 h
[8]
[a] 4.74±0.01 h [9] 9.19±0.05 h [10] | |
0.057 (assumed)
[3] 0.090±0.004 [7] 0.096±0.018 [6] [5] 0.1045±0.0204 [4] | |
C [3] | |
11.6 [4] [6] [7] · 11.7 [1] [3] | |
2023 Asaph, provisional designation 1952 SA, is a dark asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. [6] It was discovered on 16 September 1952, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. [11]
Asaph orbits the Sun in the outer main-belt at a distance of 2.1–3.7 AU once every 4 years and 11 months (1,781 days). Its orbit has an eccentricity of 0.28 and an inclination of 22 ° with respect to the ecliptic. [1] The asteroid's observation arc begins with its official discovery observation Goethe Link. [11]
In November 2001, a rotational lightcurve of Asaph was obtained from photometric observations by American astronomer Brian Warner. Lightcurve analysis gave a rotation period of 4.74 hours with a low brightness variation of 0.06 magnitude ( U=2-). [9] Upon re-examination of the revised data set, Warner constructed a new, ambiguous lightcurve with two possible period solutions of 3.87 and 6.28 hours ( U=2-). [8] [a] These observations supersede a period of 9.19 hours derived from two fragmentary lightcurves obtained in 2001 and 2006, respectively ( U=1/1). [10]
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Asaph measures between 19.678 and 21.29 kilometers in diameter and its surface has an albedo between 0.09 and 0.1045. [4] [5] [6] [7]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a larger diameter of 25.44 kilometers based on an absolute magnitude of 11.7. [3]
This minor planet was named in memory of American astronomer Asaph Hall (1829–1907), who discovered the Martian satellites, Phobos and Deimos. [2] The official naming citation was published by the Minor Planet Center on 15 October 1977 ( M.P.C. 4238). [12]
Discovery [1] | |
---|---|
Discovered by |
Indiana University ( Indiana Asteroid Program) |
Discovery site | Goethe Link Obs. |
Discovery date | 16 September 1952 |
Designations | |
(2023) Asaph | |
Named after |
Asaph Hall (American astronomer) [2] |
1952 SA | |
main-belt · ( outer) [3] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 64.53 yr (23,571 days) |
Aphelion | 3.6816 AU |
Perihelion | 2.0703 AU |
2.8760 AU | |
Eccentricity | 0.2801 |
4.88 yr (1,781 days) | |
98.697 ° | |
0° 12m 7.56s / day | |
Inclination | 22.352° |
3.1290° | |
357.53° | |
Physical characteristics | |
Dimensions | 19.678±0.264 km
[4]
[5] 20.56±0.43 km [6] 21.29±0.40 km [7] 25.44 km (calculated) [3] |
3.87±0.02 h
[8]
[a] 4.74±0.01 h [9] 9.19±0.05 h [10] | |
0.057 (assumed)
[3] 0.090±0.004 [7] 0.096±0.018 [6] [5] 0.1045±0.0204 [4] | |
C [3] | |
11.6 [4] [6] [7] · 11.7 [1] [3] | |
2023 Asaph, provisional designation 1952 SA, is a dark asteroid from the outer regions of the asteroid belt, approximately 21 kilometers in diameter. [6] It was discovered on 16 September 1952, by astronomers of the Indiana Asteroid Program at Goethe Link Observatory in Indiana, United States. [11]
Asaph orbits the Sun in the outer main-belt at a distance of 2.1–3.7 AU once every 4 years and 11 months (1,781 days). Its orbit has an eccentricity of 0.28 and an inclination of 22 ° with respect to the ecliptic. [1] The asteroid's observation arc begins with its official discovery observation Goethe Link. [11]
In November 2001, a rotational lightcurve of Asaph was obtained from photometric observations by American astronomer Brian Warner. Lightcurve analysis gave a rotation period of 4.74 hours with a low brightness variation of 0.06 magnitude ( U=2-). [9] Upon re-examination of the revised data set, Warner constructed a new, ambiguous lightcurve with two possible period solutions of 3.87 and 6.28 hours ( U=2-). [8] [a] These observations supersede a period of 9.19 hours derived from two fragmentary lightcurves obtained in 2001 and 2006, respectively ( U=1/1). [10]
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Asaph measures between 19.678 and 21.29 kilometers in diameter and its surface has an albedo between 0.09 and 0.1045. [4] [5] [6] [7]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and consequently calculates a larger diameter of 25.44 kilometers based on an absolute magnitude of 11.7. [3]
This minor planet was named in memory of American astronomer Asaph Hall (1829–1907), who discovered the Martian satellites, Phobos and Deimos. [2] The official naming citation was published by the Minor Planet Center on 15 October 1977 ( M.P.C. 4238). [12]