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4164 Shilov (1969 UR)
Classification: Main-belt Asteroid          SPK-ID: 2004164
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1507728522249028 3.2403e-08  
a 2.63488976784638 8.9362e-09 au
q 2.237619922249969 8.8529e-08 au
i 12.80993611923355 4.3943e-06 deg
node 218.0617492525236 1.3618e-05 deg
peri 221.309178739685 1.9726e-05 deg
M 315.2058145467406 1.4448e-05 deg
tp 2459394.884327422974
(2021-Jun-29.38432742)
6.2956e-05 TDB
period 1562.219675705223
4.28
7.9473e-06
2.176e-08
d
yr
n .2304413429164419 1.1723e-09 deg/d
Q 3.03215961344279 1.0283e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2934  
   data-arc span      18770 days (51.39 yr)  
   first obs. used      1969-10-16  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .37951  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:01:19  

Additional Information
 Earth MOID = 1.2675 au 
 Jupiter MOID = 2.33076 au 
 T_jup = 3.347 
[ 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 12.25   n/a E2021B10  
diameter diameter 10.486 km 0.156 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.5 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Angeli, C.A.; Barucci, M.A. (1996) Planet. Space Sci. 44, 181-186.]
[Warner, B.D. (2017) Minor Planet Bull. 44, 12-19.]
geometric albedo albedo 0.234   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4164 Shilov (1969 UR)          Discovered 1969-Oct-16 by Chernykh, L. I. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1969 UR = 1982 VA13 = 1984 FQ 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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