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1254 Erfordia (1932 JA)
Classification: Main-belt Asteroid          SPK-ID: 2001254
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 44 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03081716803981653 1.7666e-08  
a 3.134082790185361 1.2608e-08 au
q 3.037499234189522 5.2357e-08 au
i 7.071800910646573 4.0459e-07 deg
node 287.9778788739351 5.3397e-06 deg
peri 240.4960398174645 2.1928e-05 deg
M 35.51379781346215 2.0632e-05 deg
tp 2459000.578850180840
(2020-May-31.07885018)
0.00011604 TDB
period 2026.581733469676
5.55
1.2229e-05
3.348e-08
d
yr
n .1776390234129122 1.0719e-09 deg/d
Q 3.2306663461812 1.2996e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3194  
   data-arc span      32925 days (90.14 yr)  
   first obs. used      1931-01-13  
   last obs. used      2021-03-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43098  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:12:14  

Additional Information
 Earth MOID = 2.05235 au 
 Jupiter MOID = 1.81741 au 
 T_jup = 3.200 
[ 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 10.63   n/a E2021B10  
diameter diameter 51.540 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.287 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Brinsfield, J.W. (2009) Minor Planet Bull. 36, 127-128.]
[Chang, C.K.; Ip, W.-H.; Lin, H.-W.; Cheng, Y.C.; et al. (2015) Astrophys. J. Supp. Ser. 219, A27.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.032   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1254 Erfordia (1932 JA)          Discovered 1932-May-10 by Hartmann, J. at La Plata
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
1940-Aug-30 15:16 00:01 Jupiter 1.85323623500979 1.85323601955561 1.8532364504645 2.9238091905652 2.76307061481232 2429872.135919682 1.43624903989669 55.1657374894414 2.68663778701439 87.4389522183054 20540098.4005144 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
1950-Dec-09 02:45 00:01 Jupiter 1.8349359939084 1.83493584252136 1.83493614529533 3.10937469787726 2.95719351938436 2433624.614570628 1.20743373047734 76.9072644417007 4.77115775612802 87.2095875976675 8268691.25097222 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
1961-Apr-27 17:28 < 00:01 Jupiter 1.99916135832958 1.99916104960838 1.99916166705089 4.14818969345868 4.04476203238283 2437417.228088491 0.927818867333116 30.3662261062832 4.76524539586959 64.1332860593899 14276100.5843088 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2024-Mar-12 02:56 < 00:01 Jupiter 1.88123368253819 1.88123359246336 1.88123377261301 3.29586150256228 3.15629627649635 2460381.621903225 0.254369564393293 12.9085539677774 3.61233924645165 -87.0530538923402 20667263.7136773 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2034-Jun-20 23:02 < 00:01 Jupiter 1.83153607161336 1.83153591692469 1.83153622630203 2.81798307202156 2.64879166861609 2464134.459551336 0.444575361770796 27.8144126499843 2.30470166792731 -86.3726870224611 10742957.8313681 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2044-Oct-21 17:06 < 00:01 Jupiter 1.94480497093801 1.94480467913319 1.94480526274295 3.90095670906357 3.78766439885861 2467910.212407342 0.578884164070506 17.4675261739525 3.2105583790772 45.7151118978744 14153274.0787834 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2107-Sep-16 03:59 00:02 Jupiter 1.91317957554066 1.91317923582878 1.91317991525373 3.67190761898369 3.54928795974751 2490883.665710001 1.76111441023769 84.3332279154034 4.14421533942491 82.402968236097 18309877.7577666 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2118-Jan-05 10:18 00:02 Jupiter 1.83159912365019 1.83159900460922 1.83159924269168 2.71545456855362 2.53944759028081 2494647.929173194 2.11446741829066 91.8636338358008 2.09585777182302 -88.2587147260673 11253892.8235518 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2128-Apr-23 17:26 00:02 Jupiter 1.89244374680826 1.89244322635586 1.89244426726088 3.54822597730889 3.41975801816692 2498409.226306940 2.15484238376233 48.9837559943318 9.01708207065699 -70.9756297871515 5542087.06296526 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14
2191-Mar-17 03:32 00:03 Jupiter 1.96313623695835 1.9631353271065 1.963137146814 4.01313220978248 3.90413911603135 2521381.647391827 3.21856448189799 146.949644700343 5.18257384855947 74.7103433641744 14881525.4357747 T 44 CATAB v2.0f-lin.ifort 2021-Apr-12 12:14:24 2021-Apr-12 12:14

Alternate Designations
 1932 JA = 1931 BE = 1971 KG = 1974 XR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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