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85491 (1997 SL11)
Classification: Main-belt Asteroid          SPK-ID: 2085491
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1745733016081328 4.6692e-08  
a 2.33655609622586 1.1793e-08 au
q 1.928655784115102 1.0692e-07 au
i 2.601636465173216 6.9199e-06 deg
node 358.0204331483824 0.000101 deg
peri 299.5729644225701 0.00010346 deg
M 167.0786078778717 2.5997e-05 deg
tp 2458395.046084418042
(2018-Oct-03.54608442)
9.184e-05 TDB
period 1304.556055248126
3.57
9.8765e-06
2.704e-08
d
yr
n .275955945742422 2.0892e-09 deg/d
Q 2.744456408336618 1.3852e-08 au
  Orbit Determination Parameters
   # obs. used (total)      476  
   data-arc span      8749 days (23.95 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55841  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:33:10  

Additional Information
 Earth MOID = .914522 au 
 Jupiter MOID = 2.46239 au 
 T_jup = 3.545 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456775.5 (2014-Apr-28.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1750047858999954 4.6753e-08  
q 1.926938299382943 1.0709e-07 au
tp 2457091.601379770725
(2015-Mar-10.10137977)
8.7221e-05 TDB
node 358.0700224816762 0.00010087 deg
peri 299.7131140702402 0.00010333 deg
i 2.604092296046149 6.9236e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      476  
   data-arc span      8749 days (23.95 yr)  
   first obs. used      1996-02-14  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55841  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:33:10  

Additional Information
 Jupiter MOID = 2.46239 au 
 T_jup = 3.545 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.185877802720586E-15 -4.987626359618845E-15 1.881095848659137E-12 1.836790363091808E-14 3.972198407043265E-13 -8.515534509596142E-16
q -4.987626359618845E-15 1.14674779094268E-14 -4.057608885664574E-12 -3.888583085453044E-14 -8.537220461596826E-13 2.136168873633647E-15
tp 1.881095848659137E-12 -4.057608885664574E-12 7.607485910497911E-9 5.742654146829593E-11 1.963046907717565E-9 -3.250176400765633E-12
node 1.836790363091808E-14 -3.888583085453044E-14 5.742654146829593E-11 1.017427861393814E-8 -1.014775365642221E-8 2.118063573752485E-10
peri 3.972198407043265E-13 -8.537220461596826E-13 1.963046907717565E-9 -1.014775365642221E-8 1.067702883057122E-8 -2.124803066358893E-10
i -8.515534509596142E-16 2.136168873633647E-15 -3.250176400765633E-12 2.118063573752485E-10 -2.124803066358893E-10 4.79362290990338E-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 16.6   n/a MPO400789  
diameter diameter 2.560 km 0.818 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.068   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

85491 (1997 SL11)          Discovered 1997-Sep-27 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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