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JPL Small-Body Database Browser
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9880 Stegosaurus (1994 PQ31)
Classification: Main-belt Asteroid          SPK-ID: 2009880
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .11154270574824 3.475e-08  
a 2.287552225813961 8.2339e-09 au
q 2.032392461006263 8.1131e-08 au
i 3.464950073628744 4.4299e-06 deg
node 201.7919067514731 5.3771e-05 deg
peri 232.9136190472498 5.7276e-05 deg
M 321.6546268716736 2.0797e-05 deg
tp 2458735.106310689371
(2019-Sep-08.60631069)
7.3231e-05 TDB
period 1263.731915869047
3.46
6.8231e-06
1.868e-08
d
yr
n .2848705453105804 1.5381e-09 deg/d
Q 2.542711990621659 9.1524e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1354  
   data-arc span      15052 days (41.21 yr)  
   first obs. used      1977-10-18  
   last obs. used      2019-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5356  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-12 19:03:39  

Additional Information
 Earth MOID = 1.04925 au 
 Jupiter MOID = 2.67676 au 
 T_jup = 3.590 
[ 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 14.7   n/a MPO412253  
diameter diameter 2.623 km 0.297 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.281   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9880 Stegosaurus           Discovered 1994 Aug. 12 by E. W. Elst at the European Southern Observatory.
Stegosaurus was a large dinosaur, 6 to 9 meters long, with a characteristic double row of large bony plates along the back. A herbivorous dinosaur, it lived in Jurassic and Cretaceous times.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1994 PQ31 = 1977 UF4 = 1980 PO4 = 1989 CS8 = 1991 WQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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