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JPL Small-Body Database Browser
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91877 (1999 UK45)
Classification: Main-belt Asteroid          SPK-ID: 2091877
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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1224829223788109 4.2918e-08  
a 2.797486280428154 1.6845e-08 au
q 2.454841985486684 1.212e-07 au
i 10.06531106768546 5.0179e-06 deg
node 305.0026801159479 2.3991e-05 deg
peri 217.6966574854719 3.0434e-05 deg
M 14.4613861327316 1.8617e-05 deg
tp 2458931.847272428897
(2020-Mar-23.34727243)
8.8231e-05 TDB
period 1709.032709503391
4.68
1.5437e-05
4.226e-08
d
yr
n .2106454709720615 1.9026e-09 deg/d
Q 3.140130575369624 1.8909e-08 au
  Orbit Determination Parameters
   # obs. used (total)      979  
   data-arc span      7453 days (20.41 yr)  
   first obs. used      1999-09-08  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52152  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:39:10  

Additional Information
 Earth MOID = 1.47262 au 
 Jupiter MOID = 1.91194 au 
 T_jup = 3.293 
[ 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 14.4   n/a MPO337941  
diameter diameter 5.264 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.133   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

91877 (1999 UK45)          Discovered 1999-Oct-31 by CSS at Catalina
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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