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91576 (1999 SL7)
Classification: Main-belt Asteroid          SPK-ID: 2091576
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2320883769899165 5.4984e-08  
a 2.684912649387155 1.5787e-08 au
q 2.061775630231194 1.4622e-07 au
i 15.35351466902461 6.2843e-06 deg
node 2.869077335114882 1.5332e-05 deg
peri 338.5850392725897 1.9115e-05 deg
M 250.9874001256483 1.4289e-05 deg
tp 2459487.095249780221
(2021-Sep-29.59524978)
6.5955e-05 TDB
period 1606.917825304468
4.40
1.4173e-05
3.88e-08
d
yr
n .2240313688298216 1.9759e-09 deg/d
Q 3.308049668543117 1.9451e-08 au
  Orbit Determination Parameters
   # obs. used (total)      893  
   data-arc span      7537 days (20.64 yr)  
   first obs. used      1999-09-09  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51555  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:42:22  

Additional Information
 Earth MOID = 1.06211 au 
 Jupiter MOID = 2.13962 au 
 T_jup = 3.286 
[ show covariance matrix ]

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 14.6   n/a MPO337940  
diameter diameter 5.688 km 0.199 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.104   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91576 (1999 SL7)          Discovered 1999-Sep-29 by LINEAR at Socorro
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 SL7 = 2000 XM38 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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