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49879 (1999 XH135)
Classification: Main-belt Asteroid          SPK-ID: 2049879
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702689739681953 3.4913e-08  
a 2.19719032642971 6.8112e-09 au
q 1.823076983935679 7.7016e-08 au
i 5.491496695507959 4.3614e-06 deg
node 182.1706333600117 3.6555e-05 deg
peri 74.66570030276331 3.8317e-05 deg
M 169.8156619267952 1.2492e-05 deg
tp 2458039.354885944653
(2017-Oct-12.85488594)
4.0229e-05 TDB
period 1189.597230124799
3.26
5.5316e-06
1.514e-08
d
yr
n .3026234349606152 1.4072e-09 deg/d
Q 2.571303668923741 7.971e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1411  
   data-arc span      7804 days (21.37 yr)  
   first obs. used      1998-06-27  
   last obs. used      2019-11-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52208  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 03:47:29  

Additional Information
 Earth MOID = .817575 au 
 Jupiter MOID = 2.48733 au 
 T_jup = 3.643 
[ 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 15.1   n/a MPO417162  
diameter diameter 2.421 km 0.315 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.875 h n/a LCDB (Rev. 2019-January); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.330   0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49879 (1999 XH135)          Discovered 1999-Dec-06 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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