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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 189 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2658662291240299 1.9935e-08  
a 2.646516663081187 5.9243e-09 AU
q 1.942897257553881 5.1876e-08 AU
i 6.741129795141238 3.7764e-06 deg
node 179.6068433319193 2.0197e-05 deg
peri 157.2779805629378 2.0509e-05 deg
M 33.3396795222336 5.706e-06 deg
tp 2456854.863814261682
(2014-Jul-16.36381426)
2.4613e-05 JED
period 1572.57141091685
4.31
5.2804e-06
1.446e-08
d
yr
n .2289244211746866 7.6868e-10 deg/d
Q 3.350136068608493 7.4994e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2578  
   # delay obs. used      1  
   # Doppler obs. used      0  
   data-arc span      47215 days (129.27 yr)  
   first obs. used      1885-12-01  
   last obs. used      2015-03-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50977  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 15:59:09  

Additional Information
 Earth MOID = .936455 AU 
 T_jup = 3.332 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.3 mag 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. 2015-July); Warner et al., 2009  
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          Discovered 1885-Nov-12 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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