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102531 (1999 UP4)
Classification: Main-belt Asteroid          SPK-ID: 2102531
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .211779603947759 3.687e-08  
a 2.362763497511593 8.7735e-09 au
q 1.862378379786366 8.9745e-08 au
i 2.688403176309258 4.0124e-06 deg
node 16.48661845043043 8.4593e-05 deg
peri 357.6840514433169 8.512e-05 deg
M 247.8495529701161 1.0689e-05 deg
tp 2459413.763751992205
(2021-Jul-18.26375199)
4.0686e-05 TDB
period 1326.565828824122
3.63
7.3888e-06
2.023e-08
d
yr
n .2713774108889167 1.5115e-09 deg/d
Q 2.86314861523682 1.0632e-08 au
  Orbit Determination Parameters
   # obs. used (total)      863  
   data-arc span      8542 days (23.39 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51192  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 19:54:13  

Additional Information
 Earth MOID = .863188 au 
 Jupiter MOID = 2.60111 au 
 T_jup = 3.518 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO333634  
diameter diameter 1.461 km 0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.361   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

102531 (1999 UP4)          Discovered 1999-Oct-31 by Sarounova, L. at Ondrejov
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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