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2542 Calpurnia (1980 CF)
Classification: Main-belt Asteroid          SPK-ID: 2002542
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 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07728461676727699 2.1355e-08  
a 3.134487746102486 1.6146e-08 au
q 2.892240061883229 6.4833e-08 au
i 4.634594985591869 4.0114e-07 deg
node 145.6000423577307 1.7695e-06 deg
peri 49.83691592984982 9.6918e-06 deg
M 135.0796304222031 1.1736e-05 deg
tp 2458635.936193689167
(2019-Jun-01.43619369)
6.3443e-05 TDB
period 2026.974529143328
5.55
1.5662e-05
4.288e-08
d
yr
n .1776045997737075 1.3723e-09 deg/d
Q 3.376735430321742 1.7394e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2627  
   data-arc span      24476 days (67.01 yr)  
   first obs. used      1954-07-03  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42718  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:24:54  

Additional Information
 Earth MOID = 1.89483 au 
 Jupiter MOID = 1.58328 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456583.5 (2013-Oct-18.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07324092325385519 2.1421e-08  
q 2.900449619557562 6.4839e-08 au
tp 2456597.087092692081
(2013-Oct-31.58709269)
6.2474e-05 TDB
node 145.7299537366237 1.7766e-06 deg
peri 47.21834572098481 1.0237e-05 deg
i 4.620797044983826 4.0029e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2627  
   data-arc span      24476 days (67.01 yr)  
   first obs. used      1954-07-03  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42718  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 13:24:54  

Additional Information
 Jupiter MOID = 1.58328 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.588467217650507E-16 -1.357874434891981E-15 2.351269620756683E-13 3.396411434923326E-15 -1.602301185216401E-15 -7.428402316171222E-16
q -1.357874434891981E-15 4.204131572622079E-15 -5.478769848389245E-13 -1.05936847019949E-14 3.93971099019038E-14 2.159242149278006E-15
tp 2.351269620756683E-13 -5.478769848389245E-13 3.90295124581539E-9 2.994688293178181E-11 6.193225145039598E-10 -7.825494793709011E-12
node 3.396411434923326E-15 -1.05936847019949E-14 2.994688293178181E-11 3.156416480160012E-12 2.001914784180125E-12 -3.293609390599392E-13
peri -1.602301185216401E-15 3.93971099019038E-14 6.193225145039598E-10 2.001914784180125E-12 1.047889883295761E-10 -9.193483745558317E-13
i -7.428402316171222E-16 2.159242149278006E-15 -7.825494793709011E-12 -3.293609390599392E-13 -9.193483745558317E-13 1.602336766436388E-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 11.70   n/a E2021B10  
diameter diameter 20.854 km 0.281 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 16.9 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.102   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2542 Calpurnia (1980 CF)          Discovered 1980-Feb-11 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1980 CF = 1972 XN2 = 1976 OE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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