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91850 (1999 UN7)
Classification: Main-belt Asteroid          SPK-ID: 2091850
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04757098225923012 3.6974e-08  
a 3.170279319232448 2.4418e-08 au
q 3.019466017980437 1.2183e-07 au
i 8.671898231128639 5.0591e-06 deg
node 207.9353644067187 2.4403e-05 deg
peri 237.3038038145845 5.8791e-05 deg
M 250.2138171706678 5.5025e-05 deg
tp 2460025.267235460211
(2023-Mar-21.76723546)
0.00031686 TDB
period 2061.791374216531
5.64
2.3821e-05
6.522e-08
d
yr
n .1746054448097582 2.0173e-09 deg/d
Q 3.321092620484459 2.558e-08 au
  Orbit Determination Parameters
   # obs. used (total)      689  
   data-arc span      14153 days (38.75 yr)  
   first obs. used      1982-11-06  
   last obs. used      2021-08-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54032  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 02:02:52  

Additional Information
 Earth MOID = 2.04554 au 
 Jupiter MOID = 1.84457 au 
 T_jup = 3.183 
[ 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 14.79   n/a MPO637247  
diameter diameter 5.701 km 0.273 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.079   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91850 (1999 UN7)          Discovered 1999-Oct-31 by Sarounova, L. at Ondrejov
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

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