Discovery [1] | |
---|---|
Discovered by | A. D. Andrews |
Discovery site | Boyden Obs. |
Discovery date | 25 January 1965 |
Designations | |
(1727) Mette | |
Named after | Mette Andrews (wife of discoverer) [2] |
1965 BA · 1955 DC | |
Mars-crosser [1] · Hungaria [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 61.54 yr (22,477 days) |
Aphelion | 2.0430 AU |
Perihelion | 1.6652 AU |
1.8541 AU | |
Eccentricity | 0.1019 |
2.52 yr (922 days) | |
322.85 ° | |
Inclination | 22.894° |
133.04° | |
312.94° | |
Known satellites | 1(see 2nd infobox) [a] |
Earth MOID | 0.7183 AU |
Physical characteristics | |
Dimensions | 5.44±1.09 km
[5] 8.97 km (calculated) [4] |
2.427 h
[b] 2.63 h [6] 2.637 h [7] 3.22 h [8] 2.981±0.001 h [9] 2.98125±0.00004 h [9] 2.981±0.001 h [10] 2.981±0.003 h [11] 2.9814±0.0001 h [9] 2.98109±0.00007 h [12] [13] 2.9808±0.0002 h [14] 2.9812±0.0002 h [15] 3.000±0.014 h [16] | |
0.20 (assumed)
[4] 0.544±0.218 [5] | |
Tholen = S [1] [4] · S [17] [18] | |
12.6 [1] [4] [5] · 12.69±0.27 [17] · 12.70 [18] | |
1727 Mette, provisional designation 1965 BA, is a binary [a] Hungaria asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 9 kilometers in diameter.
It was discovered on 25 January 1965, by Irish astronomer David Andrews at Boyden Observatory near Bloemfontein in Free State, South Africa . [3] It was named after the discoverer's wife Mette Andrews. [2]
The S-type asteroid is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It is also a Mars-crossing asteroid, a dynamically unstable group between the main belt and the near-Earth populations.
It orbits the Sun in the inner main-belt at a distance of 1.7–2.0 AU once every 2 years and 6 months (922 days). Its orbit has an eccentricity of 0.10 and an inclination of 23 ° with respect to the ecliptic. [1] Being a Mars-crosser, Mette will make a relatively close approach to Mars on April 15, 2023, when it will pass near the Red Planet at a distance of less than 0.08 AU (12,000,000 km). [1] It was first identified as 1955 DC at Goethe Link Observatory in 1955, extending the body's observation arc by 10 years prior to its official discovery observation. [3]
A large number of rotational lightcurves of Mette were obtained from photometric observations. They gave a rotation period of approximately 2.981 hours (best rated results) with a brightness variation between 0.22 and 0.38 magnitude, indicating a moderately elongated body ( U=3/3/3). [9] [10] [14] [15] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.97 kilometers, [4] while observations with the Wide-field Infrared Survey Explorer gave a diameter of 5.44 kilometers and an albedo of 0.544. [5]
This minor planet was named by the discoverer after his wife, Mette Andrews for her comprehension of his nocturnal working hours and absence from home. [2] The approved naming citation was published by the Minor Planet Center on 1 February 1980 ( M.P.C. 5183). [19]
Discovery | |
---|---|
Discovery date | 17 January 2013 [a] |
Light-curve | |
Orbital characteristics | |
21 km | |
0.8746±0.0008 days (20 hours, 59±1 minutes) | |
31 mas (maximum) | |
Satellite of | 1727 Mette |
Physical characteristics | |
Dimensions | 2.14 km [20] |
3.4 ± 0.2 fainter than primary [20] | |
15.7 | |
In 2013, a satellite orbiting the asteroid was discovered. The moon measures about 2 kilometers in diameter and orbits Mette once every 20 hours and 59 minutes. [12] [13] [20]
There are several hundreds of asteroids known to have satellites (also see Category:Binary asteroids). [21]
Discovery [1] | |
---|---|
Discovered by | A. D. Andrews |
Discovery site | Boyden Obs. |
Discovery date | 25 January 1965 |
Designations | |
(1727) Mette | |
Named after | Mette Andrews (wife of discoverer) [2] |
1965 BA · 1955 DC | |
Mars-crosser [1] · Hungaria [3] [4] | |
Orbital characteristics [1] | |
Epoch 4 September 2017 ( JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 61.54 yr (22,477 days) |
Aphelion | 2.0430 AU |
Perihelion | 1.6652 AU |
1.8541 AU | |
Eccentricity | 0.1019 |
2.52 yr (922 days) | |
322.85 ° | |
Inclination | 22.894° |
133.04° | |
312.94° | |
Known satellites | 1(see 2nd infobox) [a] |
Earth MOID | 0.7183 AU |
Physical characteristics | |
Dimensions | 5.44±1.09 km
[5] 8.97 km (calculated) [4] |
2.427 h
[b] 2.63 h [6] 2.637 h [7] 3.22 h [8] 2.981±0.001 h [9] 2.98125±0.00004 h [9] 2.981±0.001 h [10] 2.981±0.003 h [11] 2.9814±0.0001 h [9] 2.98109±0.00007 h [12] [13] 2.9808±0.0002 h [14] 2.9812±0.0002 h [15] 3.000±0.014 h [16] | |
0.20 (assumed)
[4] 0.544±0.218 [5] | |
Tholen = S [1] [4] · S [17] [18] | |
12.6 [1] [4] [5] · 12.69±0.27 [17] · 12.70 [18] | |
1727 Mette, provisional designation 1965 BA, is a binary [a] Hungaria asteroid and Mars-crosser from the inner regions of the asteroid belt, approximately 9 kilometers in diameter.
It was discovered on 25 January 1965, by Irish astronomer David Andrews at Boyden Observatory near Bloemfontein in Free State, South Africa . [3] It was named after the discoverer's wife Mette Andrews. [2]
The S-type asteroid is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It is also a Mars-crossing asteroid, a dynamically unstable group between the main belt and the near-Earth populations.
It orbits the Sun in the inner main-belt at a distance of 1.7–2.0 AU once every 2 years and 6 months (922 days). Its orbit has an eccentricity of 0.10 and an inclination of 23 ° with respect to the ecliptic. [1] Being a Mars-crosser, Mette will make a relatively close approach to Mars on April 15, 2023, when it will pass near the Red Planet at a distance of less than 0.08 AU (12,000,000 km). [1] It was first identified as 1955 DC at Goethe Link Observatory in 1955, extending the body's observation arc by 10 years prior to its official discovery observation. [3]
A large number of rotational lightcurves of Mette were obtained from photometric observations. They gave a rotation period of approximately 2.981 hours (best rated results) with a brightness variation between 0.22 and 0.38 magnitude, indicating a moderately elongated body ( U=3/3/3). [9] [10] [14] [15] The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 8.97 kilometers, [4] while observations with the Wide-field Infrared Survey Explorer gave a diameter of 5.44 kilometers and an albedo of 0.544. [5]
This minor planet was named by the discoverer after his wife, Mette Andrews for her comprehension of his nocturnal working hours and absence from home. [2] The approved naming citation was published by the Minor Planet Center on 1 February 1980 ( M.P.C. 5183). [19]
Discovery | |
---|---|
Discovery date | 17 January 2013 [a] |
Light-curve | |
Orbital characteristics | |
21 km | |
0.8746±0.0008 days (20 hours, 59±1 minutes) | |
31 mas (maximum) | |
Satellite of | 1727 Mette |
Physical characteristics | |
Dimensions | 2.14 km [20] |
3.4 ± 0.2 fainter than primary [20] | |
15.7 | |
In 2013, a satellite orbiting the asteroid was discovered. The moon measures about 2 kilometers in diameter and orbits Mette once every 20 hours and 59 minutes. [12] [13] [20]
There are several hundreds of asteroids known to have satellites (also see Category:Binary asteroids). [21]