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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 ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 213 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6630233921504364 2.1118e-08  
a 2.19929751819672 4.3039e-09 au
q .7411118173338946 4.7012e-08 au
i 3.039696499812417 2.1987e-06 deg
node 82.23623762965272 6.4439e-05 deg
peri 168.906543149326 6.3473e-05 deg
M 33.9487508676176 7.2096e-06 deg
tp 2458888.157081625745
(2020-Feb-08.65708163)
2.3529e-05 TDB
period 1191.308946018082
3.26
3.497e-06
9.574e-09
d
yr
n .3021886146354313 8.8706e-10 deg/d
Q 3.657483219059545 7.1576e-09 au
  Orbit Determination Parameters
   # obs. used (total)      860  
   # delay obs. used      8  
   # Doppler obs. used      9  
   data-arc span      12322 days (33.74 yr)  
   first obs. used      1987-01-29  
   last obs. used      2020-10-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53301  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-25 07:37:25  

Additional Information
 Earth MOID = .0462892 au 
 Jupiter MOID = 1.40489 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 15.5   n/a MPO502196  
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-August); 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: 2003-08-29

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