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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07472218499380463 3.8356e-08  
a 3.133558899601405 1.6814e-08 au
q 2.899412531816405 1.1929e-07 au
i 4.622023407280834 3.9798e-06 deg
node 145.6638249250956 5.1329e-05 deg
peri 49.06416069849268 5.8111e-05 deg
M 65.75423234751787 2.5856e-05 deg
tp 2458630.436347081073
(2019-May-26.93634708)
0.00014611 TDB
period 2026.073612215815
5.55
1.6307e-05
4.465e-08
d
yr
n .1776835737010987 1.4301e-09 deg/d
Q 3.367705267386404 1.8071e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2456  
   data-arc span      24138 days (66.09 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42825  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:52:51  

Additional Information
 Earth MOID = 1.90137 au 
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456338.5 (2013-Feb-15.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07313161544496073 3.836e-08  
q 2.900669384056176 1.1905e-07 au
tp 2456596.612952006855
(2013-Oct-31.11295201)
0.00015327 TDB
node 145.7306405390114 5.1379e-05 deg
peri 47.11694265414312 5.8443e-05 deg
i 4.620810887888056 3.9794e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2456  
   data-arc span      24138 days (66.09 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42825  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:52:51  

Additional Information
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.471513011700189E-15 -4.526649084965545E-15 3.125665173427238E-14 -2.469715191207059E-16 -3.160990088839931E-15 -6.324220683369536E-16
q -4.526649084965545E-15 1.41729606667545E-14 -7.592117261270634E-13 -4.369941022294015E-15 -1.148957031164214E-13 3.014523263726239E-15
tp 3.125665173427238E-14 -7.592117261270634E-13 2.349166730277447E-8 1.655086072650192E-11 4.292630900665371E-9 -2.512937704753531E-12
node -2.469715191207059E-16 -4.369941022294015E-15 1.655086072650192E-11 2.639761014024782E-9 -2.628149402212494E-9 2.133724743371009E-11
peri -3.160990088839931E-15 -1.148957031164214E-13 4.292630900665371E-9 -2.628149402212494E-9 3.415577444533209E-9 -2.167192484598612E-11
i -6.324220683369536E-16 3.014523263726239E-15 -2.512937704753531E-12 2.133724743371009E-11 -2.167192484598612E-11 1.583568657195764E-11

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 11.6   n/a MPO309166  
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. 2019-August); 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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