+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   31824 Elatus (1999 UG5) Classification: Centaur          SPK-ID: 2031824 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] 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. 2020-October); 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.arc Last Updated: 2005-04-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 18:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin