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638 Moira (A917 RC)
Classification: Main-belt Asteroid          SPK-ID: 2000638
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1591645187510731 3.3294e-08  
a 2.734888127109668 5.2084e-09 au
q 2.299590974520235 9.1403e-08 au
i 7.713452644771107 3.0741e-06 deg
node 103.1898009347831 2.5202e-05 deg
peri 128.9523522078463 2.6849e-05 deg
M 359.3942763853471 9.103e-06 deg
tp 2459003.279583853520
(2020-Jun-02.77958385)
4.1776e-05 TDB
period 1651.991375374472
4.52
4.7191e-06
1.292e-08
d
yr
n .2179188132373847 6.2251e-10 deg/d
Q 3.170185279699102 6.0374e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3437  
   data-arc span      41899 days (114.71 yr)  
   first obs. used      1906-01-24  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42562  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:27:27  

Additional Information
 Earth MOID = 1.29752 au 
 Jupiter MOID = 1.86345 au 
 T_jup = 3.321 
[ 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 10.0   n/a MPO279519  
diameter diameter 59.594 km 0.387 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 9.8768 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.060   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B Ch   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)

638 Moira (A917 RC)          Discovered 1907-May-05 by Metcalf, J. H. at Taunton
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
1904-Aug-23 21:37 < 00:01 Jupiter 1.89896723708354 1.8989668318313 1.89896764233643 1.9483264403111 1.70407991807744 2416716.400992040 0.954832307143538 116.413227510131 13.9270266520096 84.1625616231891 3168424.94061448 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27
1941-May-08 10:15 < 00:01 Jupiter 1.87218874828398 1.87218842079303 1.87218907577493 2.11129829411049 1.88486952719793 2430122.927281415 0.621612335828494 81.7712975162441 16.0363341083944 -80.012377486069 2537246.52975784 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27
1999-Sep-06 23:35 < 00:01 Jupiter 1.88616526661248 1.88616497572651 1.88616555749834 1.90628788126351 1.65402269305634 2451428.482840247 0.18510478189378 77.1872303164392 17.9551859783723 87.6273854182882 3143414.50561285 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27
2036-May-21 06:32 < 00:01 Jupiter 1.88875861711043 1.88875831795884 1.88875891626212 2.23359475941414 2.02287822720345 2464834.771932032 0.250935566650077 73.8224269949024 12.2420967594405 -80.1024865427146 2815630.92759178 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27
2094-Sep-20 23:41 < 00:01 Jupiter 1.87800487336995 1.87800455918701 1.87800518755309 1.90566095569619 1.652119430058 2486141.486722805 0.737821912206593 113.227323035624 19.9676243287028 -87.896713827089 3024260.80605096 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27
2131-Jun-03 14:01 00:01 Jupiter 1.89847633192087 1.89847590831211 1.89847675552973 2.33211910486136 2.13224325389433 2499545.084059842 1.01982920313858 73.0201547475497 10.8309502643394 -81.13665957416 2246042.32696776 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27
2189-Oct-06 19:34 00:02 Jupiter 1.86349908887026 1.86349870800413 1.86349946973883 1.91060935528593 1.6557057026908 2520855.315586306 1.55270445192814 180.470461871215 21.9053227527905 -85.5362691696528 2870081.57731084 T 84 CATAB v2.0f-lin.ifort 2020-Nov-13 04:27:36 2020-Nov-13 04:27

Alternate Designations
 A917 RC = 1944 QJ = 1976 WA1 = A893 EB = A906 BF = A907 JG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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