Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1493141854589066 2.5725e-08  
a 2.626304683134512 6.6298e-09 au
q 2.23416013860537 6.6031e-08 au
i 5.277069745970846 3.8278e-06 deg
node 149.9976202905578 3.4431e-05 deg
peri 109.860219015191 3.7429e-05 deg
M 94.70289953026857 1.4291e-05 deg
tp 2458791.543736365107
(2019-Nov-04.04373637)
6.161e-05 TDB
period 1554.590784852433
4.26
5.8865e-06
1.612e-08
d
yr
n .2315721947587464 8.7686e-10 deg/d
Q 3.018449227663653 7.6197e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3339  
   data-arc span      37861 days (103.66 yr)  
   first obs. used      1917-05-21  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41254  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:50:35  

Additional Information
 Earth MOID = 1.22393 au 
 Jupiter MOID = 2.06097 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 11.44   n/a E2021B10 IRAS observations used: 3
diameter diameter 34.471 km 0.103 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.006 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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

[ hide close-approach data ]
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
1990-Oct-18 20:36 < 00:01 Amphi 0.0398060448092012 0.0398050452766412 0.0398070443622197 5.5684783126758 5.56847828674072 2448183.358122989 0.267956722275303 75.413004754634 30.2390551401111 -55.018164267019 167532.91062413 T 37 CATAB v2.0f-lin.ifort 2021-Feb-24 00:50:45 2021-Feb-24 00:50
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Mar-03 03:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin