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

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456803.5 (2014-May-26.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03348025218827888 1.7786e-08  
q 3.03255274441421 5.2889e-08 au
tp 2456966.899368054185
(2014-Nov-05.39936805)
0.0001041 TDB
node 288.0276269697521 5.3184e-06 deg
peri 239.4047125672447 1.9907e-05 deg
i 7.073852496717524 4.0357e-07 deg
  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
 Jupiter MOID = 1.81774 au 
 T_jup = 3.200 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.163465565834017E-16 -9.199663596675706E-16 -1.028510106251924E-12 -1.493200790567047E-14 -1.930803766868507E-13 1.482915097843682E-15
q -9.199663596675706E-16 2.7972849484554E-15 3.216033645785291E-12 4.355898065018672E-14 6.053796531073635E-13 -4.550184031650005E-15
tp -1.028510106251924E-12 3.216033645785291E-12 1.083774586478693E-8 5.285199946127297E-11 2.002801568450491E-9 5.718696909577389E-12
node -1.493200790567047E-14 4.355898065018672E-14 5.285199946127297E-11 2.828567489761768E-11 -1.674907206640019E-11 1.545573491144073E-12
peri -1.930803766868507E-13 6.053796531073635E-13 2.002801568450491E-9 -1.674907206640019E-11 3.963046910546691E-10 -6.168800050269692E-13
i 1.482915097843682E-15 -4.550184031650005E-15 5.718696909577389E-12 1.545573491144073E-12 -6.168800050269692E-13 1.628656107862095E-13

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

[ show close-approach data ]
Alternate Designations
 1932 JA = 1931 BE = 1971 KG = 1974 XR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-26 07:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin