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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04850203203657121 4.1542e-08  
a 3.170599225523244 2.6167e-08 au
q 3.016818720311787 1.3202e-07 au
i 8.662324510572125 5.7236e-06 deg
node 208.1573515054759 2.5387e-05 deg
peri 236.1157611111937 5.8768e-05 deg
M 217.1062480906042 5.3839e-05 deg
tp 2460019.004722333140
(2023-Mar-15.50472233)
0.00031032 TDB
period 2062.103458706619
5.65
2.5528e-05
6.989e-08
d
yr
n .1745790195346441 2.1612e-09 deg/d
Q 3.3243797307347 2.7436e-08 au
  Orbit Determination Parameters
   # obs. used (total)      660  
   data-arc span      13738 days (37.61 yr)  
   first obs. used      1982-11-06  
   last obs. used      2020-06-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54471  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:48:04  

Additional Information
 Earth MOID = 2.04214 au 
 Jupiter MOID = 1.84843 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 14.77   n/a E2021B10  
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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