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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03064328231407193 1.7677e-08  
a 3.133588598922259 1.2197e-08 au
q 3.037565158829328 5.2364e-08 au
i 7.071909411268343 4.0351e-07 deg
node 287.9759614624218 5.3246e-06 deg
peri 240.3793234155929 2.1994e-05 deg
M 70.46564256344814 2.0696e-05 deg
tp 2458999.914975906346
(2020-May-30.41497591)
0.0001163 TDB
period 2026.102416438804
5.55
1.1829e-05
3.239e-08
d
yr
n .1776810476504722 1.0374e-09 deg/d
Q 3.229612039015191 1.2571e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3411  
   data-arc span      33079 days (90.57 yr)  
   first obs. used      1931-01-13  
   last obs. used      2021-08-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 07:29:15  

Additional Information
 Earth MOID = 2.05357 au 
 Jupiter MOID = 1.81774 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 10.62   n/a MPCxxxxx  
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 1.85323623311344 1.85323602256598 1.85323644366142 2.9238091942749 2.76307061856856 2429872.135915749 1.39498701062423 53.5826890466937 2.68237744996594 87.4253965711754 20572271.4042471 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
1950-Dec-09 02:45 00:01 Jupiter 1.8349359944116 1.83493584364966 1.83493614517344 3.10937463479034 2.9571934530937 2433624.614577083 1.17292573595498 74.8109405911011 4.75480734743109 87.1401708713568 8290058.21715856 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
1961-Apr-27 17:28 < 00:01 Jupiter 1.99916136003672 1.99916105944107 1.99916166063249 4.14818967616849 4.04476201473996 2437417.228087408 0.901487194057516 29.4916953744601 4.76455818952273 64.1524968250111 14279693.2823264 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2024-Mar-12 02:56 < 00:01 Jupiter 1.88123368171206 1.88123359187935 1.88123377154478 3.29586155280156 3.15629632889447 2460381.621910531 0.250910584730363 12.7939936567721 3.59743532604 -87.2647955708845 20749294.3877896 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2034-Jun-20 23:02 < 00:01 Jupiter 1.83153607122598 1.83153591693491 1.83153622551716 2.81798307058498 2.64879166705082 2464134.459551776 0.434913742225816 27.2748022713607 2.28721181256079 -86.2559858345251 10813193.1802248 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2044-Oct-21 17:06 < 00:01 Jupiter 1.94480496989938 1.94480468063818 1.94480525916057 3.90095667160518 3.78766436021839 2467910.212413593 0.564320339135576 17.3288044275845 3.20666592212618 45.7778625683096 14192824.5561872 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2107-Sep-16 03:59 00:02 Jupiter 1.91317957659424 1.91317924406682 1.91317990912286 3.67190768352629 3.5492880265886 2490883.665723182 1.71472557663619 82.1502615908053 4.13846925906812 82.3747527302318 18333322.0913419 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2118-Jan-05 10:18 00:02 Jupiter 1.83159912306719 1.83159900422851 1.83159924190639 2.71545457503125 2.53944759714944 2494647.929186621 2.0582708251716 89.4499188674845 2.08671634859462 -88.2327296884534 11298478.2023028 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2128-Apr-23 17:26 00:02 Jupiter 1.89244374538273 1.89244323458177 1.8924442561839 3.54822585191313 3.41975788796191 2498409.226328985 2.09673667714268 47.5926797894815 9.0018218788512 -70.8319648513218 5546432.83292973 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31
2191-Mar-17 03:32 00:03 Jupiter 1.96313623990933 1.96313535252617 1.96313712729617 4.01313229923185 3.90413920814403 2521381.647411394 3.13178141924472 143.013862125428 5.17201060328776 74.6823206951537 14909996.2810725 T 49 CATAB v2.0g-lin.ifort 2021-Aug-25 07:31:01 2021-Aug-25 07:31

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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