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253 Mathilde (A885 VA)
Classification: Main-belt Asteroid          SPK-ID: 2000253
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 218 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2632605127872869 2.0418e-08  
a 2.649153178903038 4.6324e-09 au
q 1.951735754572953 5.3038e-08 au
i 6.739731153535466 3.1783e-06 deg
node 179.5322956046401 1.8434e-05 deg
peri 157.7430436413759 1.8766e-05 deg
M 175.7631093618333 5.3006e-06 deg
tp 2458431.574508141388
(2018-Nov-09.07450814)
2.223e-05 TDB
period 1574.92193938855
4.31
4.131e-06
1.131e-08
d
yr
n .2285827576570346 5.9957e-10 deg/d
Q 3.346570603233123 5.852e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4324  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      49356 days (135.13 yr)  
   first obs. used      1885-12-01  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43982  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:50  

Additional Information
 Earth MOID = .942949 au 
 Jupiter MOID = 2.0758 au 
 T_jup = 3.331 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454200.5 (2007-Apr-10.0) TDB
Reference: JPL 218 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2661571633732702 2.0615e-08  
q 1.942304543899219 5.3766e-08 au
tp 2453711.364373305967
(2005-Dec-06.86437331)
1.9365e-05 TDB
node 179.633037009993 1.8443e-05 deg
peri 157.475240364052 1.8756e-05 deg
i 6.738235507721952 3.1814e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      4324  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      49356 days (135.13 yr)  
   first obs. used      1885-12-01  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43982  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:44:50  

Additional Information
 Jupiter MOID = 2.0758 au 
 T_jup = 3.331 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.249826272654504E-16 -1.106478249711504E-15 -1.088716715376101E-13 1.498953169020732E-14 -2.076681459252097E-14 1.154717777368206E-15
q -1.106478249711504E-15 2.890757104302839E-15 2.823252814845376E-13 -3.984552622272654E-14 5.484662852309306E-14 -3.098396341881006E-15
tp -1.088716715376101E-13 2.823252814845376E-13 3.749875634961644E-10 5.287342102342321E-12 7.064291602342059E-11 9.435810694405752E-13
node 1.498953169020732E-14 -3.984552622272654E-14 5.287342102342321E-12 3.401260447211649E-10 -3.363433588118469E-10 7.519728056273149E-13
peri -2.076681459252097E-14 5.484662852309306E-14 7.064291602342059E-11 -3.363433588118469E-10 3.517761472137112E-10 -5.564425788739323E-13
i 1.154717777368206E-15 -3.098396341881006E-15 9.435810694405752E-13 7.519728056273149E-13 -5.564425788739323E-13 1.012156332550391E-11

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 10.39   n/a E2021B10  
diameter diameter 52.8 km n/a n/a Yeomans E-mail 2001-Apr-04
GM GM 0.00689 km^3/s^2 0.00030 Yeomans et al. (1997) Science v.278, pp.2106-2109  
bulk density density 1.3 g/cm^3 0.2 Yeomans et al. (1997) Science v.278, pp.2106-2109 based on a nominal volume of 78000 km^3 (with lower/uppper limits of 67000/90000 km^3)
rotation period rot_per 417.7 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Sears, W.D.; Erikson, A.; Harris, A.W.; et al. (1995) Planet. Space Sci. 43, 1609-1613.]
[Pravec, P.; et al. (2005) Icarus 173, 108-131.]
geometric albedo albedo 0.0436   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20
SMASSII spectral type spec_B Cb   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)

253 Mathilde (A885 VA)          Discovered 1885-Nov-12 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A885 VA = 1949 OL1 = A915 TN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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