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249904 (2001 SG90)
Classification: Main-belt Asteroid          SPK-ID: 2249904
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03308698980319519 5.5054e-08  
a 2.688621076492253 2.5543e-08 au
q 2.599662698349698 1.536e-07 au
i 11.08848628352413 6.9499e-06 deg
node 181.0770335056165 2.3493e-05 deg
peri 67.91830819114851 0.00011418 deg
M 186.9918556845481 0.00011621 deg
tp 2459774.350151992616
(2022-Jul-13.85015199)
0.00052521 TDB
period 1610.248210103832
4.41
2.2947e-05
6.283e-08
d
yr
n .2235680174901648 3.1859e-09 deg/d
Q 2.777579454634808 2.6388e-08 au
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      6650 days (18.21 yr)  
   first obs. used      2001-09-11  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56894  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 16:46:17  

Additional Information
 Earth MOID = 1.61097 au 
 Jupiter MOID = 2.21593 au 
 T_jup = 3.345 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457388.5 (2016-Jan-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03437169103721801 5.3555e-08  
q 2.595233610114046 1.4928e-07 au
tp 2458171.572740183444
(2018-Feb-22.07274018)
0.00050615 TDB
node 181.113361644836 2.3468e-05 deg
peri 69.62560250057784 0.00011254 deg
i 11.0951055310498 6.9536e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      364  
   data-arc span      6650 days (18.21 yr)  
   first obs. used      2001-09-11  
   last obs. used      2019-11-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56894  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 16:46:17  

Additional Information
 Jupiter MOID = 2.21593 au 
 T_jup = 3.345 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.868182402887174E-15 -7.887585385097054E-15 -1.647274705770692E-11 -1.084309979957508E-14 -3.594073415026225E-12 5.863263885639144E-15
q -7.887585385097054E-15 2.22844486279213E-14 5.000538856216202E-11 3.102903831371875E-14 1.086021869447321E-11 -1.506591789189115E-14
tp -1.647274705770692E-11 5.000538856216202E-11 2.561924322138462E-7 1.245327020819302E-10 5.572066332494312E-8 -3.503749073429717E-11
node -1.084309979957508E-14 3.102903831371875E-14 1.245327020819302E-10 5.507242626832474E-10 -5.129454670879391E-10 6.960138228057804E-11
peri -3.594073415026225E-12 1.086021869447321E-11 5.572066332494312E-8 -5.129454670879391E-10 1.266533993894982E-8 -7.614590485947436E-11
i 5.863263885639144E-15 -1.506591789189115E-14 -3.503749073429717E-11 6.960138228057804E-11 -7.614590485947436E-11 4.835300609148869E-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 16.0   n/a MPO503177  

249904 (2001 SG90)          Discovered 2001-Sep-20 by LINEAR at Socorro
Reference: 20100923/Numbers.arcLast Updated: 2010-09-27

Alternate Designations
 2001 SG90 = 2004 FE26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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