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120912 (1998 SP75)
Classification: Main-belt Asteroid          SPK-ID: 2120912
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940720308171575 3.4271e-08  
a 2.797791555986558 1.9397e-08 au
q 2.254818466913151 9.7343e-08 au
i 12.49550441032098 5.8912e-06 deg
node 182.0305654503174 2.0066e-05 deg
peri 125.0713937103619 2.6387e-05 deg
M 279.7176324572996 1.9936e-05 deg
tp 2459381.687920846442
(2021-Jun-16.18792085)
9.7099e-05 TDB
period 1709.312464305825
4.68
1.7776e-05
4.867e-08
d
yr
n .2106109956591237 2.1902e-09 deg/d
Q 3.340764645059964 2.3161e-08 au
  Orbit Determination Parameters
   # obs. used (total)      670  
   data-arc span      8417 days (23.04 yr)  
   first obs. used      1997-04-13  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5966  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 20:41:25  

Additional Information
 Earth MOID = 1.26738 au 
 Jupiter MOID = 2.10837 au 
 T_jup = 3.264 
[ 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 14.9   n/a MPO436584  
diameter diameter 5.009 km 1.443 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.077   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

120912 (1998 SP75)          Discovered 1998-Sep-21 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 SP75 = 1997 GP29 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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