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85157 (1987 SP5)
Classification: Main-belt Asteroid          SPK-ID: 2085157
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 .2276317513022202 3.8037e-08  
a 2.263256068614666 8.2304e-09 au
q 1.748067126070532 8.3459e-08 au
i 6.190393254287496 4.7187e-06 deg
node 3.89205355521266 3.7982e-05 deg
peri 53.07013141396342 3.9793e-05 deg
M 183.8536499240982 1.1441e-05 deg
tp 2459609.013356297031
(2022-Jan-29.51335630)
4.1132e-05 TDB
period 1243.652270810809
3.40
6.7838e-06
1.857e-08
d
yr
n .2894699816414881 1.579e-09 deg/d
Q 2.7784450111588 1.0104e-08 au
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      11809 days (32.33 yr)  
   first obs. used      1987-09-29  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54955  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:29  

Additional Information
 Earth MOID = .767726 au 
 Jupiter MOID = 2.60869 au 
 T_jup = 3.576 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456986.5 (2014-Nov-25.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268032419379227 3.795e-08  
q 1.750329429363475 8.3104e-08 au
tp 2457121.855336979207
(2015-Apr-09.35533698)
3.6565e-05 TDB
node 3.918419583819166 3.7973e-05 deg
peri 53.13656138823097 3.9803e-05 deg
i 6.191112244462166 4.7188e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      739  
   data-arc span      11809 days (32.33 yr)  
   first obs. used      1987-09-29  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54955  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:27:29  

Additional Information
 Jupiter MOID = 2.60869 au 
 T_jup = 3.576 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.44017492286418E-15 -3.146257625278376E-15 5.761724931605659E-14 1.549635710066536E-14 -5.707124779502547E-14 -5.186810617859557E-15
q -3.146257625278376E-15 6.906253413541784E-15 -8.793601930412701E-14 -3.376571443736151E-14 1.346550818247806E-13 1.12022418685335E-14
tp 5.761724931605659E-14 -8.793601930412701E-14 1.337000001507516E-9 2.998145048904359E-12 4.406842115189289E-10 -5.445288018329013E-12
node 1.549635710066536E-14 -3.376571443736151E-14 2.998145048904359E-12 1.441974161929158E-9 -1.433373400060953E-9 -4.448375187347658E-11
peri -5.707124779502547E-14 1.346550818247806E-13 4.406842115189289E-10 -1.433373400060953E-9 1.584310003969729E-9 4.270247584767759E-11
i -5.186810617859557E-15 1.12022418685335E-14 -5.445288018329013E-12 -4.448375187347658E-11 4.270247584767759E-11 2.226722645621323E-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 MPO366210  

85157 (1987 SP5)          Discovered 1987-Sep-30 by Jensen, P. at Brorfelde
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1987 SP5 = 1999 HA6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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