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JPL Small-Body Database Browser
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873 Mechthild (A917 KJ)
Classification: Main-belt Asteroid          SPK-ID: 2000873
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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1491910479551161 3.4778e-08  
a 2.626848663354414 7.8551e-09 au
q 2.234946358449073 9.2758e-08 au
i 5.274410750821075 3.9003e-06 deg
node 150.0311819063371 4.5473e-05 deg
peri 110.2260728304055 4.7803e-05 deg
M 315.4762604293514 1.4581e-05 deg
tp 2458792.826947875479
6.3088e-05 TDB
period 1555.073807879702
n .2315002658882471 1.0384e-09 deg/d
Q 3.018750968259755 9.027e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2676  
   data-arc span      37343 days (102.24 yr)  
   first obs. used      1917-05-21  
   last obs. used      2019-08-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44774  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:13:01  

Additional Information
 Earth MOID = 1.22596 au 
 Jupiter MOID = 2.0627 au 
 T_jup = 3.380 
[ 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 11.49   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
diameter diameter 34.471 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.006 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Lagerkvist, C.-I. (1978) Astron. Astrophys. Suppl. Ser. 31, 361-381.]
[Warner, B.D. (2009) Minor Planet Bull. 36, 172-176.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Garceran, A.C.; Aznar, A.; Mansego, E.A.; Rodriguez, P.B.; et al. (2016) Minor Planet Bull. 43, 92-97.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.040   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.684   0.022 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=11.58 deg.
U-B UB 0.319   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=11.58 deg.
Tholen spectral type spec_T PC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

873 Mechthild (A917 KJ)          Discovered 1917-May-21 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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