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JPL Small-Body Database Browser
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4557 Mika (1987 XD)
Classification: Main-belt Asteroid          SPK-ID: 2004557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04879439995561474 3.7751e-08  
a 3.024122145188659 1.7117e-08 au
q 2.876561919721691 1.1671e-07 au
i 11.2818165408883 4.1161e-06 deg
node 113.0616058109861 2.0989e-05 deg
peri 35.18714565032755 4.7234e-05 deg
M 280.2332382980841 4.2267e-05 deg
tp 2459026.114955577637
(2020-Jun-25.61495558)
0.00022636 TDB
period 1920.867548572792
5.26
1.6309e-05
4.465e-08
d
yr
n .1874153167236756 1.5912e-09 deg/d
Q 3.171682370655625 1.7952e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1960  
   data-arc span      23384 days (64.02 yr)  
   first obs. used      1955-10-23  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47217  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:37:26  

Additional Information
 Earth MOID = 1.89759 au 
 Jupiter MOID = 1.88857 au 
 T_jup = 3.214 
[ 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 12.0   n/a MPO365302  
diameter diameter 14.005 km 0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.188   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

4557 Mika (1987 XD)          Discovered 1987-Dec-14 by Yanai and Watanabe at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1987 XD = 1966 WN = 1983 AL4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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