(39546) 1992 DT5

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(39546) 1992 DT5
Discovery [1]
Discovered by UESAC
Discovery site La Silla Obs.
Discovery date 29 February 1992
MPC designation (39546) 1992 DT5
1992 DT5 · 1999 TA162
main-belt · (middle)[2]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 0
Observation arc 24.40 yr (8,913 days)
Aphelion 2.8585 AU
Perihelion 2.7247 AU
2.7916 AU
Eccentricity 0.0240
4.66 yr (1,704 days)
0° 12m 40.68s / day
Inclination 5.2625°
Physical characteristics
Dimensions 5.34 km (calculated)[2]
1167.3602±100.0594 h[3]
0.057 (assumed)[2]
14.641±0.007 (R)[3] · 14.7[1] · 14.88±0.30[4] · 15.09[2]

(39546) 1992 DT5 is a carbonaceous asteroid and exceptionally slow rotator from the middle region of the asteroid belt, approximately 5 kilometers in diameter. It was discovered on 29 February 1992, by the Uppsala–ESO Survey of Asteroids and Comets (UESAC) at ESO's La Silla astronomical observatory site in northern Chile.[5]

Orbit and classification[edit]

The C-type asteroid 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). Its orbit has an eccentricity of 0.02 and an inclination of 5° with respect to the ecliptic.[1] As no precoveries were taken, the asteroid's observation arc begins with its discovery observation in February 1992.[5]

Physical characteristics[edit]

In September 2013, a rotational lightcurve was obtained for this asteroid from photometric observations at the U.S Palomar Transient Factory in California, it gave a rotation period of 1167 hours with an estimated error margin of ±100 hours. According to the Light Curve Data Base (LCDB),[2] it is the 8th slowest rotating minor planet known to exist. With a high amplitude of 0.80 magnitude for its lightcurve, the body is likely to have a non-spheroidal shape (U=2).[3]

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.[2]

Numbering and naming[edit]

This minor planet was numbered by the Minor Planet Center on 26 May 2002.[6] As of 2018, it has not been named.[5]


  1. ^ a b c d "JPL Small-Body Database Browser: 39546 (1992 DT5)" (2016-07-25 last obs.). Jet Propulsion Laboratory. Retrieved 26 May 2017. 
  2. ^ a b c d e f g "LCDB Data for (39546)". Asteroid Lightcurve Database (LCDB). Retrieved 13 September 2016. 
  3. ^ a b c Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal. 150 (3): 35. arXiv:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 13 September 2016. 
  4. ^ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce; et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus. 261: 34–47. arXiv:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 13 September 2016. 
  5. ^ a b c "39546 (1992 DT5)". Minor Planet Center. Retrieved 13 September 2016. 
  6. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 24 February 2018. 

External links[edit]