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30999 (1995 UJ31)
Classification: Main-belt Asteroid          SPK-ID: 2030999
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1189441249798253 3.2605e-08  
a 2.990690375567847 1.4706e-08 au
q 2.634965325760344 9.8198e-08 au
i 1.618514646913668 3.7078e-06 deg
node 11.92431622757053 0.00013739 deg
peri 38.81109440021142 0.00013845 deg
M 293.4569410608565 1.8946e-05 deg
tp 2459549.685231238934
(2021-Dec-01.18523124)
0.00010071 TDB
period 1889.102864372081
5.17
1.3933e-05
3.815e-08
d
yr
n .1905666476873722 1.4056e-09 deg/d
Q 3.34641542537535 1.6455e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1283  
   data-arc span      9219 days (25.24 yr)  
   first obs. used      1995-09-26  
   last obs. used      2020-12-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52012  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:43:50  

Additional Information
 Earth MOID = 1.64492 au 
 Jupiter MOID = 2.00653 au 
 T_jup = 3.245 
[ 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 14.11   n/a E2021B10  
diameter diameter 3.842 km 0.788 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.330   0.203 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

30999 (1995 UJ31)          Discovered 1995-Oct-21 by Spacewatch at Kitt Peak
Reference: 20011130/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1995 UJ31 = 1998 HH67 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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