Discovery [1] | |
---|---|
Discovered by | UESAC |
Discovery site | La Silla Obs. |
Discovery date | 29 February 1992 |
Designations | |
(39546) 1992 DT5 | |
1992 DT5 · 1999 TA162 | |
main-belt
[1]
[2] · (
middle)
[3] Hoffmeister [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 25.68 yr (9,378 d) |
Aphelion | 2.8587 AU |
Perihelion | 2.7254 AU |
2.7921 AU | |
Eccentricity | 0.0239 |
4.67 yr (1,704 d) | |
276.01 ° | |
0° 12m 40.68s / day | |
Inclination | 5.2622° |
150.60° | |
304.53° | |
Physical characteristics | |
5.34 km (calculated) [3] | |
1167±100 h [5] | |
0.057 (assumed) [3] | |
C (assumed) [3] | |
14.641±0.007 (R)
[5] 14.7 [2] 14.88±0.30 [6] 15.09 [3] | |
(39546) 1992 DT5 is a dark Hoffmeister asteroid and exceptionally slow rotator from the central region of the asteroid belt, approximately 5.3 kilometers (3.3 miles) in diameter. The likely elongated C-type asteroid was discovered on 29 February 1992, by the Uppsala–ESO Survey of Asteroids and Comets at ESO's La Silla astronomical observatory site in northern Chile. [1]
1992 DT5 is an attributed member of the very compact Hoffmeister family ( 519), which, based upon its low albedo, was most likely formed from the breakup of a 50–100 kilometer-sized, carbon-rich parent body within the past several hundred million years. [7] [8] The family consist of nearly 2000 known members and its namesake is the asteroid 1726 Hoffmeister. [9]
It orbits the Sun in the central main-belt at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,704 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.02 and an inclination of 5 ° with respect to the ecliptic. [2] The body's observation arc begins with its discovery observation at La Silla in February 1992. [1]
1992 DT5 is an assumed carbonaceous C-type asteroid. [3] The overall spectral type of the Hoffmeister family is that of a C- and F-type. [9]: 23
In September 2013, a rotational lightcurve for this asteroid was obtained from photometric observations in the R-band at the Palomar Transient Factory in California. It gave an exceptionally long rotation period of 1167 hours with an estimated error margin of ±100 hours. According to the Light Curve Data Base (LCDB), [3] it is the 8th slowest rotating minor planet known to exist. Due to its high brightness amplitude of 0.80 magnitude, the body has a likely elongated shape ( U=2). [5]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 5.3 kilometers based on an absolute magnitude of 15.09. [3]
This minor planet was numbered by the Minor Planet Center on 26 May 2002 ( M.P.C. 45660). [10] As of 2018, it has not been named. [1]
Discovery [1] | |
---|---|
Discovered by | UESAC |
Discovery site | La Silla Obs. |
Discovery date | 29 February 1992 |
Designations | |
(39546) 1992 DT5 | |
1992 DT5 · 1999 TA162 | |
main-belt
[1]
[2] · (
middle)
[3] Hoffmeister [4] | |
Orbital characteristics [2] | |
Epoch 23 March 2018 ( JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 25.68 yr (9,378 d) |
Aphelion | 2.8587 AU |
Perihelion | 2.7254 AU |
2.7921 AU | |
Eccentricity | 0.0239 |
4.67 yr (1,704 d) | |
276.01 ° | |
0° 12m 40.68s / day | |
Inclination | 5.2622° |
150.60° | |
304.53° | |
Physical characteristics | |
5.34 km (calculated) [3] | |
1167±100 h [5] | |
0.057 (assumed) [3] | |
C (assumed) [3] | |
14.641±0.007 (R)
[5] 14.7 [2] 14.88±0.30 [6] 15.09 [3] | |
(39546) 1992 DT5 is a dark Hoffmeister asteroid and exceptionally slow rotator from the central region of the asteroid belt, approximately 5.3 kilometers (3.3 miles) in diameter. The likely elongated C-type asteroid was discovered on 29 February 1992, by the Uppsala–ESO Survey of Asteroids and Comets at ESO's La Silla astronomical observatory site in northern Chile. [1]
1992 DT5 is an attributed member of the very compact Hoffmeister family ( 519), which, based upon its low albedo, was most likely formed from the breakup of a 50–100 kilometer-sized, carbon-rich parent body within the past several hundred million years. [7] [8] The family consist of nearly 2000 known members and its namesake is the asteroid 1726 Hoffmeister. [9]
It orbits the Sun in the central main-belt at a distance of 2.7–2.9 AU once every 4 years and 8 months (1,704 days; semi-major axis of 2.79 AU). Its orbit has an eccentricity of 0.02 and an inclination of 5 ° with respect to the ecliptic. [2] The body's observation arc begins with its discovery observation at La Silla in February 1992. [1]
1992 DT5 is an assumed carbonaceous C-type asteroid. [3] The overall spectral type of the Hoffmeister family is that of a C- and F-type. [9]: 23
In September 2013, a rotational lightcurve for this asteroid was obtained from photometric observations in the R-band at the Palomar Transient Factory in California. It gave an exceptionally long rotation period of 1167 hours with an estimated error margin of ±100 hours. According to the Light Curve Data Base (LCDB), [3] it is the 8th slowest rotating minor planet known to exist. Due to its high brightness amplitude of 0.80 magnitude, the body has a likely elongated shape ( U=2). [5]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for carbonaceous asteroids of 0.057 and calculates a diameter of 5.3 kilometers based on an absolute magnitude of 15.09. [3]
This minor planet was numbered by the Minor Planet Center on 26 May 2002 ( M.P.C. 45660). [10] As of 2018, it has not been named. [1]