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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03105255999266025 3.6324e-08  
a 3.134866533571504 1.3218e-08 au
q 3.037520902468792 1.1479e-07 au
i 7.07184962299455 3.5765e-06 deg
node 287.9800055854083 2.9436e-05 deg
peri 240.6143855606274 6.221e-05 deg
M 359.8710637613308 5.4287e-05 deg
tp 2459001.226105131892
(2020-May-31.72610513)
0.00030571 TDB
period 2027.34196513736
5.55
1.2822e-05
3.51e-08
d
yr
n .1775724106690647 1.123e-09 deg/d
Q 3.232212164674216 1.3628e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3062  
   data-arc span      32658 days (89.41 yr)  
   first obs. used      1931-01-13  
   last obs. used      2020-06-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .435  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:28:39  

Additional Information
 Earth MOID = 2.0527 au 
 Jupiter MOID = 1.81685 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 10.5   n/a MPO296136  
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. 2019-August); 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 00:02 Jupiter 1.85323651658317 1.85323613198003 1.8532369011863 2.92381085234208 2.7630723974797 2429872.136358547 1.52790598358853 64.2228565877021 13.7173298879717 -86.1858941074754 3775554.03581143 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
1950-Dec-09 02:45 00:01 Jupiter 1.83493614927222 1.83493577138779 1.83493652715665 3.10937505145416 2.95719390351117 2433624.614842593 1.26640992442447 98.1859321003722 14.6831411461783 89.1166862890198 3747545.94381894 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
1961-Apr-27 17:29 < 00:01 Jupiter 1.99916136097517 1.99916097287043 1.99916174908003 4.14818985811262 4.04476220080705 2437417.228165414 0.966010786675907 52.3285851470324 15.3238266217213 80.4730074506807 4413781.39195829 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2024-Mar-12 02:56 < 00:01 Jupiter 1.88123386306261 1.8812335174513 1.88123420867392 3.29586245002024 3.15629727874984 2460381.621948389 0.280160895167548 35.344619922256 12.4836454032127 -77.4583534306665 4187347.91792682 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2034-Jun-20 23:02 < 00:01 Jupiter 1.83153628528619 1.83153590095389 1.83153666961849 2.81798406720589 2.64879274677202 2464134.459665061 0.508625154114266 52.9884432975934 12.4652190907096 -84.3961650438908 3659851.60583629 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2044-Oct-21 17:06 < 00:01 Jupiter 1.94480497081374 1.94480456277123 1.9448053788562 3.90095695036661 3.78766464673667 2467910.212573824 0.661457990169478 52.8863289100189 17.2684841341639 85.5004555806685 3860398.82287029 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2107-Sep-16 04:00 00:02 Jupiter 1.91317988461294 1.91317936183592 1.91318040739072 3.67190978452379 3.5492902195641 2490883.666381772 1.88571335716676 96.7425497277494 16.1478269764149 82.8419167769699 4037396.76484297 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2118-Jan-05 10:19 00:02 Jupiter 1.83159935314507 1.8315989672501 1.83159973904003 2.71545590816486 2.5394490445508 2494647.930099662 2.28332566239393 105.196747186754 12.6822699025433 -87.6138272933512 3686748.14269661 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2128-Apr-23 17:27 00:02 Jupiter 1.89244357569091 1.89244296111759 1.89244419026445 3.54822440631672 3.41975637560074 2498409.227289031 2.34088611120115 81.8097279400586 20.2808050829368 -82.6512421045981 2684815.89653148 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28
2191-Mar-17 03:34 00:03 Jupiter 1.96313677259076 1.96313570826413 1.9631378369213 4.01313488118964 3.90414189155979 2521381.648389381 3.44232963281897 160.893151506699 17.8833309034527 74.7196417897066 4244407.40985167 T 39 CATAB v2.0f-lin.ifort 2020-Jun-23 15:28:53 2020-Jun-23 15:28

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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