(374158) 2004 UL

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(374158) 2004 UL
Discovery [1]
Discovered by LINEAR
Discovery site Lincoln Lab's ETS
Discovery date 18 October 2004
Designations
MPC designation (374158) 2004 UL
2004 UL
Apollo · NEO · PHA · Mercury crosser · Venus crosser · Earth crosser · Mars crosser
Orbital characteristics[1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 15.05 yr (5,498 days)
Aphelion 2.4401 AU
Perihelion 0.0928 AU
1.2664 AU
Eccentricity 0.9267
1.43 yr (521 days)
182.61°
0° 41m 29.76s / day
Inclination 23.784°
39.577°
149.57°
Earth MOID 0.0181 AU
Physical characteristics
Dimensions 0.5–1.2 km[2]
0.516 km (calculated)[3]
38±2 h[4]
0.20 (assumed)[3]
S[3]
18.77 (R)[a] · 18.8[1][3]

(374158) 2004 UL is an outstandingly eccentric asteroid, classified as near-Earth object and potentially hazardous asteroid.[5] It is known for having the second-smallest perihelion of any known asteroid, after (137924) 2000 BD19.[citation needed] It measures between 0.5 and 1.2 kilometers in diameter and was discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) at Lincoln Lab's ETS on 18 October 2004.[5]

The stony S-type asteroid orbits the Sun at a distance of 0.1–2.4 AU once every 1 years and 5 months (521 days). Its orbit has an eccentricity of 0.93 and an inclination of 24° with respect to the ecliptic.[1]

In October 2014, a rotational light-curve for this asteroid was obtained from photometric observations by American astronomer Brian D. Warner at the Palmer Divide Station, California. It gave a relatively slow rotation period of 38±2 hours with a high brightness variation of 1.2 in magnitude (U=2).[4]

Due to its orbit, it is also a Mercury-crosser, Venus-crosser, Apollo and Mars-crosser.

References[edit]

  1. ^ Jewitt (Jewitt-2013) . Abs. magnitude of 18.77 (R). Summary figures at Collaborative Asteroid Lightcurve Link (CALL) for (374158)
  1. ^ a b c d "JPL Small-Body Database Browser: 374158 (2004 UL)" (2016-10-07 last obs.). Jet Propulsion Laboratory. Retrieved 14 December 2016. 
  2. ^ "NEODyS (374158) 2004UL". Near Earth Objects - Dynamic Site. Retrieved 2014-03-07. 
  3. ^ a b c d "LCDB Data for (374158)". Asteroid Lightcurve Database (LCDB). Retrieved 18 August 2016. 
  4. ^ a b Warner, Brian D. (April 2015). "Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 October-December". The Minor Planet Bulletin. 42 (2): 115–127. Bibcode:2015MPBu...42..115W. ISSN 1052-8091. Retrieved 18 August 2016. 
  5. ^ a b "374158 (2004 UL)". Minor Planet Center. Retrieved 18 August 2016. 

External links[edit]