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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 ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 214 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2631280122296618 2.0425e-08  
a 2.649317502339708 4.655e-09 au
q 1.952207854183809 5.3046e-08 au
i 6.738740055301819 3.1951e-06 deg
node 179.5395619160363 1.8674e-05 deg
peri 157.7191390586108 1.9009e-05 deg
M 130.0823268428388 5.2437e-06 deg
tp 2458431.365076553819
(2018-Nov-08.86507655)
2.2253e-05 TDB
period 1575.068477120375
4.31
4.1512e-06
1.137e-08
d
yr
n .2285614912807927 6.024e-10 deg/d
Q 3.346427150495608 5.8799e-09 au
  Orbit Determination Parameters
   # obs. used (total)      4181  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      49273 days (134.90 yr)  
   first obs. used      1885-12-01  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44567  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:31:41  

Additional Information
 Earth MOID = .945271 au 
 Jupiter MOID = 2.07541 au 
 T_jup = 3.331 
[ 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 10.3   n/a MPO267706  
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. 2019-August); 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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2003-Jan-27 03:49 < 00:01 Inter 0.0198595711354509 0.0198590643609683 0.0198600779124787 5.63318468427575 5.63318455341938 2452666.659336213 0.271924614274279 28.1008407133315 10.464037088555 -28.17127307027 163174.605282198 T 214 CATAB v2.0f-lin.ifort 2020-Nov-13 04:31:54 2020-Nov-13 04:31

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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