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31824 Elatus (1999 UG5)
Classification: Centaur          SPK-ID: 2031824
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3828998108235384 1.6744e-07  
a 11.78506814640726 5.2128e-06 au
q 7.272567782605414 4.609e-06 au
i 5.244472596747993 4.7305e-06 deg
node 87.18061827935144 0.00014285 deg
peri 281.4374509245963 0.00015644 deg
M 195.4054886890684 0.00014675 deg
tp 2465756.807729238896
(2038-Nov-29.30772924)
0.010498 TDB
period 14777.35049093622
40.46
0.0098045
2.684e-05
d
yr
n .02436160665071917 1.6164e-08 deg/d
Q 16.29756851020911 7.2088e-06 au
  Orbit Determination Parameters
   # obs. used (total)      466  
   data-arc span      7919 days (21.68 yr)  
   first obs. used      1998-09-19  
   last obs. used      2020-05-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61794  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 00:58:51  

Additional Information
 Earth MOID = 6.27673 au 
 Jupiter MOID = 2.35184 au 
 T_jup = 3.210 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.1   n/a PDS3 (MPO 18900)  
diameter diameter 57.000 km 15.900 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  
rotation period rot_per 26.82 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Gutierrez, P.J.; Ortiz, J.L.; Alexandrino, E.; Roos-Serote, M.; Doressoundiram, A. (2001) Astron. Astrophys. 371, L1-L4.]
[Bauer, J.M.; Meech, K.J.; Fernandez, Y.R.; Farnham, T.L.; Roush, T.L. (2002) Publ. Astron. Soc. Pacific 114, 1309-1321.]
geometric albedo albedo 0.050   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  

31824 Elatus           Discovered 1999 Oct. 29 by the Catalina Sky Survey.
The name of the centaur Elatus is associated with woodlands and means "fir man", perhaps because he used to pull up whole fir trees and use them as weapons. During a battle with Hercules, Elatus was killed by a poisoned arrow that passed through his arm and continued to wound Chiron in the knee.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030614/MPCPages.arcLast Updated: 2005-04-26

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