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305608 (2008 YG157)
Classification: Main-belt Asteroid          SPK-ID: 2305608
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08059680627633603 5.8891e-08  
a 2.29769507497093 1.3778e-08 au
q 2.112508190131406 1.3509e-07 au
i 5.097203242906258 7.2109e-06 deg
node 127.016605354198 7.1593e-05 deg
peri 343.0139212822268 8.5239e-05 deg
M 100.6707991258136 4.5433e-05 deg
tp 2458644.755632861223
(2019-Jun-10.25563286)
0.00015971 TDB
period 1272.146176270107
3.48
1.1442e-05
3.133e-08
d
yr
n .2829863475717144 2.5453e-09 deg/d
Q 2.482881959810453 1.4888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      115  
   data-arc span      7707 days (21.10 yr)  
   first obs. used      1999-03-20  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:00:30  

Additional Information
 Earth MOID = 1.12969 au 
 Jupiter MOID = 2.58174 au 
 T_jup = 3.584 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457195.5 (2015-Jun-22.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08026049258053926 5.9146e-08  
q 2.113337413721231 1.3566e-07 au
tp 2457374.175517071340
(2015-Dec-17.67551707)
0.00015755 TDB
node 127.0485668792449 7.1564e-05 deg
peri 343.5383958550422 8.5242e-05 deg
i 5.097969418872282 7.2129e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      115  
   data-arc span      7707 days (21.10 yr)  
   first obs. used      1999-03-20  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .67139  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:00:30  

Additional Information
 Jupiter MOID = 2.58174 au 
 T_jup = 3.584 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.498209307473091E-15 -7.989045375575561E-15 1.871570663211091E-12 -8.70290898577409E-15 5.61472551199297E-13 -3.981681183331219E-16
q -7.989045375575561E-15 1.840496716633473E-14 -3.954411440414385E-12 2.119401616699131E-14 -1.196043940872775E-12 1.291171452420814E-15
tp 1.871570663211091E-12 -3.954411440414385E-12 2.482180581048383E-8 1.66762376244165E-11 7.328381783698209E-9 -3.067143156438142E-15
node -8.70290898577409E-15 2.119401616699131E-14 1.66762376244165E-11 5.121383797119391E-9 -5.095607303587005E-9 8.938565120992803E-11
peri 5.61472551199297E-13 -1.196043940872775E-12 7.328381783698209E-9 -5.095607303587005E-9 7.266225925923185E-9 -8.899683135801061E-11
i -3.981681183331219E-16 1.291171452420814E-15 -3.067143156438142E-15 8.938565120992803E-11 -8.899683135801061E-11 5.202609139299133E-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 18.2   n/a MPO460267  

305608 (2008 YG157)          Discovered 2008-Dec-29 by Spacewatch at Kitt Peak
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

Alternate Designations
 2008 YG157 = 1999 FJ79 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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