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85867 (1999 BY9)
Classification: Amor [NEO]          SPK-ID: 2085867
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 157 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3023714741467603 5.0042e-08  
a 1.82975369724756 5.0118e-09 au
q 1.27648837448533 8.8595e-08 au
i .9440571803514539 3.1114e-06 deg
node 254.3909594346043 0.00019339 deg
peri 287.4296363042261 0.0001937 deg
M 187.1429279272413 1.127e-05 deg
tp 2459434.582251105385
(2021-Aug-08.08225111)
2.9874e-05 TDB
period 904.0394386187552
2.48
3.7144e-06
1.017e-08
d
yr
n .3982127157527875 1.6361e-09 deg/d
Q 2.383019020009789 6.5273e-09 au
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      9168 days (25.10 yr)  
   first obs. used      1995-09-19  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-26 06:55:02  

Additional Information
 Earth MOID = .279811 au 
 Jupiter MOID = 2.57835 au 
 T_jup = 3.974 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456314.5 (2013-Jan-22.0) TDB
Reference: JPL 157 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3025045231178191 5.0148e-08  
q 1.276392687150337 8.8706e-08 au
tp 2456721.716398791587
(2014-Mar-05.21639879)
2.0521e-05 TDB
node 254.4715200308977 0.00019348 deg
peri 287.3715966239749 0.0001938 deg
i .9436445728274387 3.1113e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      664  
   data-arc span      9168 days (25.10 yr)  
   first obs. used      1995-09-19  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59074  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-26 06:55:02  

Additional Information
 Jupiter MOID = 2.57835 au 
 T_jup = 3.974 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.514776151410095E-15 -4.44746846446914E-15 6.978321673229879E-13 -8.27961563069434E-15 2.629057921797404E-13 -6.98632606151321E-15
q -4.44746846446914E-15 7.868830414919029E-15 -1.222217817182322E-12 1.263460797511672E-14 -4.587930263255585E-13 1.231402106977132E-14
tp 6.978321673229879E-13 -1.222217817182322E-12 4.210935911962173E-10 -2.712811128524424E-11 2.239372447274349E-10 -1.841170030128669E-12
node -8.27961563069434E-15 1.263460797511672E-14 -2.712811128524424E-11 3.743540144829739E-8 -3.744465618995647E-8 -8.279479421361E-11
peri 2.629057921797404E-13 -4.587930263255585E-13 2.239372447274349E-10 -3.744465618995647E-8 3.75575617940103E-8 8.21915827947604E-11
i -6.98632606151321E-15 1.231402106977132E-14 -1.841170030128669E-12 -8.279479421361E-11 8.21915827947604E-11 9.680246800389991E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.1   n/a MPO474744  
rotation period rot_per 700. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]

85867 (1999 BY9)          Discovered 1999-Jan-23 by Korlevic, K. at Visnjan
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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