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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07568692855123631 3.8172e-08  
a 3.136663667704261 1.7628e-08 au
q 2.89925922879747 1.1921e-07 au
i 4.627750004316519 3.9661e-06 deg
node 145.6103982917919 5.0809e-05 deg
peri 49.81427177749086 5.7399e-05 deg
M 100.4595188036963 2.5271e-05 deg
tp 2458634.275118055300
(2019-May-30.77511806)
0.00014347 TDB
period 2029.085545376829
5.56
1.7105e-05
4.683e-08
d
yr
n .1774198238315985 1.4956e-09 deg/d
Q 3.374068106611052 1.8962e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2510  
   data-arc span      24252 days (66.40 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:03:53  

Additional Information
 Earth MOID = 1.90038 au 
 Jupiter MOID = 1.58682 au 
 T_jup = 3.202 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456377.5 (2013-Mar-26.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07313822156061578 3.8064e-08  
q 2.900590864731134 1.1789e-07 au
tp 2456596.741951441936
(2013-Oct-31.24195144)
0.00015309 TDB
node 145.7306235280639 5.0992e-05 deg
peri 47.14439709158171 5.8081e-05 deg
i 4.620866195604656 3.9613e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2510  
   data-arc span      24252 days (66.40 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-11-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42461  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 01:03:53  

Additional Information
 Jupiter MOID = 1.58682 au 
 T_jup = 3.202 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.448854114357943E-15 -4.447896043029317E-15 -1.97936491359173E-15 -2.338375472304549E-16 -1.067537959008013E-14 -5.816864148783567E-16
q -4.447896043029317E-15 1.389810716861906E-14 -6.432118786791194E-13 -4.314807613902575E-15 -8.859103958329817E-14 2.836084150163142E-15
tp -1.97936491359173E-15 -6.432118786791194E-13 2.343738194308915E-8 1.71854126399052E-11 4.279963366224665E-9 -2.393679888973307E-12
node -2.338375472304549E-16 -4.314807613902575E-15 1.71854126399052E-11 2.600185972915313E-9 -2.588600955875351E-9 1.897449659472622E-11
peri -1.067537959008013E-14 -8.859103958329817E-14 4.279963366224665E-9 -2.588600955875351E-9 3.373367714169151E-9 -1.92925816651013E-11
i -5.816864148783567E-16 2.836084150163142E-15 -2.393679888973307E-12 1.897449659472622E-11 -1.92925816651013E-11 1.569196821628316E-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 11.70   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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