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49832 (1999 XA84)
Classification: Main-belt Asteroid          SPK-ID: 2049832
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299246106994595 3.5357e-08  
a 2.268660243947447 7.9463e-09 au
q 1.973905444943234 7.9187e-08 au
i 8.83380940335098 3.6107e-06 deg
node 111.9574890916641 2.3681e-05 deg
peri 146.4461985373396 2.7188e-05 deg
M 200.1048598270367 1.2839e-05 deg
tp 2459554.851696515146
(2021-Dec-06.35169651)
4.4424e-05 TDB
period 1248.109295439344
3.42
6.5576e-06
1.795e-08
d
yr
n .2884362782293655 1.5154e-09 deg/d
Q 2.56341504295166 8.9788e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1696  
   data-arc span      7882 days (21.58 yr)  
   first obs. used      1998-06-29  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50965  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:35:28  

Additional Information
 Earth MOID = .964664 au 
 Jupiter MOID = 2.51242 au 
 T_jup = 3.587 
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Orbital Elements at Epoch 2456918.5 (2014-Sep-18.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .129845576914549 3.5277e-08  
q 1.973613276947418 7.8984e-08 au
tp 2457059.531581907811
(2015-Feb-06.03158191)
4.6434e-05 TDB
node 111.9944108064253 2.369e-05 deg
peri 146.5726454183015 2.7219e-05 deg
i 8.832463673640223 3.6099e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1696  
   data-arc span      7882 days (21.58 yr)  
   first obs. used      1998-06-29  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50965  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:35:28  

Additional Information
 Jupiter MOID = 2.51242 au 
 T_jup = 3.587 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.244446698009125E-15 -2.775962708983553E-15 -3.335709479355558E-13 -7.961307715043796E-15 -1.089377662007596E-13 -7.756734311415529E-17
q -2.775962708983553E-15 6.238500040553961E-15 6.647612898355182E-13 1.805019423770107E-14 2.192820058430807E-13 2.763480622422734E-16
tp -3.335709479355558E-13 6.647612898355182E-13 2.156079223433208E-9 8.228483881063169E-12 6.336970769472738E-10 -1.134553946455569E-12
node -7.961307715043796E-15 1.805019423770107E-14 8.228483881063169E-12 5.612348524372804E-10 -5.520037660940142E-10 -1.844778872195649E-11
peri -1.089377662007596E-13 2.192820058430807E-13 6.336970769472738E-10 -5.520037660940142E-10 7.408790203635798E-10 1.788641426410242E-11
i -7.756734311415529E-17 2.763480622422734E-16 -1.134553946455569E-12 -1.844778872195649E-11 1.788641426410242E-11 1.303102655332561E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.4   n/a MPO449320  
diameter diameter 3.180 km 0.819 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 2.520 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.365   0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

49832 (1999 XA84)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XA84 = 2001 KX45 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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