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JPL Small-Body Database Browser
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4486 Mithra (1987 SB)
Classification: Apollo [NEO, PHA]          SPK-ID: 2004486
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 194 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6630226627066466 2.134e-08  
a 2.199680865661755 4.3901e-09 au
q .7412426010058371 4.7524e-08 au
i 3.039797681096034 2.4212e-06 deg
node 82.23810241351289 7.1101e-05 deg
peri 168.8964718775919 7.0062e-05 deg
M 273.0979592824729 7.0933e-06 deg
tp 2458888.150687760816
(2020-Feb-08.65068776)
2.4337e-05 TDB
period 1191.620435364622
3.26
3.5673e-06
9.767e-09
d
yr
n .3021096225912274 9.0441e-10 deg/d
Q 3.658119130317674 7.3008e-09 au
  Orbit Determination Parameters
   # obs. used (total)      776  
   # delay obs. used      8  
   # Doppler obs. used      9  
   data-arc span      11667 days (31.94 yr)  
   first obs. used      1987-01-29  
   last obs. used      2019-01-08  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52927  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jan-20 07:46:55  

Additional Information
 Earth MOID = .0463988 au 
 Jupiter MOID = 1.4036 au 
 T_jup = 3.338 
[ 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 15.6   n/a PDS3 (MPC 28111)  
diameter diameter 1.849 km 0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  
extent extent 2.35 x 1.65 x 1.44 km n/a Brozovic et al., 2010, Icarus, 208:207-220  
rotation period rot_per 67.5 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Brozovic, M.; Benner, L.A.M.; Magri, C.; Ostro, S.J.; et al. (2010) Icarus 208, 207-220.]
geometric albedo albedo 0.297   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[neos] (http://adsabs.harvard.edu/abs/2011ApJ...743..156M)  

4486 Mithra (1987 SB)          Discovered 1987-Sep-22 by Elst and Shkodrov at Rozhen
Reference: DISCOVERY.DBLast Updated: 2013-09-05

[ show close-approach data ]
Alternate Designations
 1987 SB = 1974 DN1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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