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205 Martha (A879 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000205
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03636853055779864 3.462e-08  
a 2.776959744936676 1.0054e-08 au
q 2.67596579959517 9.4687e-08 au
i 10.69526384505752 3.7975e-06 deg
node 211.7781015891198 2.1253e-05 deg
peri 176.3286949169113 5.9216e-05 deg
M 137.4620903011609 5.5188e-05 deg
tp 2458355.093632018875
(2018-Aug-24.59363202)
0.00025898 TDB
period 1690.257233570112
4.63
9.1798e-06
2.513e-08
d
yr
n .2129853331493329 1.1567e-09 deg/d
Q 2.877953690278182 1.042e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2960  
   data-arc span      51331 days (140.54 yr)  
   first obs. used      1879-10-13  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41283  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:00:42  

Additional Information
 Earth MOID = 1.68075 au 
 Jupiter MOID = 2.28931 au 
 T_jup = 3.309 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456226.5 (2012-Oct-26.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03407192236971734 3.4459e-08  
q 2.6829659468061 9.3917e-08 au
tp 2456657.139590268352
(2013-Dec-30.63959027)
0.00027788 TDB
node 211.9285208076721 2.1289e-05 deg
peri 174.7550383956652 6.2966e-05 deg
i 10.68352318269212 3.7944e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2960  
   data-arc span      51331 days (140.54 yr)  
   first obs. used      1879-10-13  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41283  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:00:42  

Additional Information
 Jupiter MOID = 2.28931 au 
 T_jup = 3.309 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.187403510311598E-15 -3.219755599967255E-15 -6.113926898830617E-13 3.5597403355978E-15 -1.448677731399214E-13 2.771074314907986E-16
q -3.219755599967255E-15 8.820398236400125E-15 1.740675102789355E-12 -9.837866949075836E-15 4.042616382523617E-13 -3.012138590930444E-16
tp -6.113926898830617E-13 1.740675102789355E-12 7.721531149394431E-8 -5.478743099920899E-13 1.64845850529195E-8 5.598310575137209E-12
node 3.5597403355978E-15 -9.837866949075836E-15 -5.478743099920899E-13 4.532211547279707E-10 -4.452088854558423E-10 -3.152187985325565E-12
peri -1.448677731399214E-13 4.042616382523617E-13 1.64845850529195E-8 -4.452088854558423E-10 3.964738046090669E-9 4.281305719855354E-12
i 2.771074314907986E-16 -3.012138590930444E-16 5.598310575137209E-12 -3.152187985325565E-12 4.281305719855354E-12 1.439748243711975E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.5   n/a MPO502154 IRAS observations used: 18
diameter diameter 76.983 km 0.601 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.911 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Warner, B.D. (2012) Minor Planet Bull. 39, 233-234.]
[Pilcher, F. (2014) Minor Planet Bull. 41, 47-49.]
[Durech, J.; Hanus, J. (2018) Astron. Astrophys. 620, A91.]
geometric albedo albedo 0.061   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.688   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=9.90 deg.
U-B UB 0.350   0.044 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=9.90 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

205 Martha (A879 TB)          Discovered 1879-Oct-13 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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