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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 ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08033950043809814 5.1529e-08  
a 2.29828595162672 1.331e-08 au
q 2.113642806409131 1.163e-07 au
i 5.097379834361824 5.9307e-06 deg
node 127.01402673202 7.1348e-05 deg
peri 343.120942370125 8.428e-05 deg
M 157.1619232172652 4.4853e-05 deg
tp 2458644.916480700807
(2019-Jun-10.41648070)
0.00015689 TDB
period 1272.636926637821
3.48
1.1055e-05
3.027e-08
d
yr
n .2828772232400045 2.4573e-09 deg/d
Q 2.48292909684431 1.4379e-08 au
  Orbit Determination Parameters
   # obs. used (total)      129  
   data-arc span      7729 days (21.16 yr)  
   first obs. used      1999-03-20  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65416  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:11:22  

Additional Information
 Earth MOID = 1.1307 au 
 Jupiter MOID = 2.58057 au 
 T_jup = 3.584 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457530.5 (2016-May-22.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0805885610152559 5.1647e-08  
q 2.113265454313601 1.1666e-07 au
tp 2457374.358509660418
(2015-Dec-17.85850966)
0.00015297 TDB
node 127.0471829855861 7.1341e-05 deg
peri 343.5981628448574 8.4136e-05 deg
i 5.097441559705884 5.9314e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      129  
   data-arc span      7729 days (21.16 yr)  
   first obs. used      1999-03-20  
   last obs. used      2020-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65416  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-11 19:11:22  

Additional Information
 Jupiter MOID = 2.58057 au 
 T_jup = 3.584 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.667411236987342E-15 -5.993686497804178E-15 8.471330114391087E-13 -7.876188555304056E-15 2.081122251274898E-13 -6.82190341634948E-16
q -5.993686497804178E-15 1.361052345846175E-14 -1.507549955827975E-12 1.9603802757878E-14 -3.509889318584141E-13 1.742158860861132E-15
tp 8.471330114391087E-13 -1.507549955827975E-12 2.339920355055776E-8 2.030792094532256E-12 6.859631079525316E-9 -1.112180760341604E-11
node -7.876188555304056E-15 1.9603802757878E-14 2.030792094532256E-12 5.08960886221362E-9 -5.068320761748698E-9 6.593746969651633E-11
peri 2.081122251274898E-13 -3.509889318584141E-13 6.859631079525316E-9 -5.068320761748698E-9 7.078914628126514E-9 -6.897707170494768E-11
i -6.82190341634948E-16 1.742158860861132E-15 -1.112180760341604E-11 6.593746969651633E-11 -6.897707170494768E-11 3.518092054644623E-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 18.16   n/a E2021B25  

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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