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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 221 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2632605509591002 1.4363e-08  
a 2.649153187211232 3.9285e-09 au
q 1.951735659570947 3.6225e-08 au
i 6.739731978823087 3.37e-07 deg
node 179.5323484993782 3.0261e-06 deg
peri 157.7429885264614 4.132e-06 deg
M 175.7631127966089 2.6555e-06 deg
tp 2458431.574489497768
(2018-Nov-09.07448950)
1.0431e-05 TDB
period 1574.921946797384
4.31
3.5033e-06
9.592e-09
d
yr
n .2285827565817231 5.0846e-10 deg/d
Q 3.346570714851518 4.9628e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4522  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      49421 days (135.31 yr)  
   first obs. used      1885-12-01  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43371  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:07:28  

Additional Information
 Earth MOID = .942949 au 
 Jupiter MOID = 2.0758 au 
 T_jup = 3.331 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.38   n/a MPCxxxxx  
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

Alternate Designations
 A885 VA = 1949 OL1 = A915 TN 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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