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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07472218503482819 3.9221e-08  
a 3.133558899588709 1.7149e-08 au
q 2.899412531676109 1.2272e-07 au
i 4.622023422120348 4.0467e-06 deg
node 145.6638249357118 5.2007e-05 deg
peri 49.06416071048695 5.8725e-05 deg
M 65.75423233086083 2.5862e-05 deg
tp 2458630.436347177068
(2019-May-26.93634718)
0.00014616 TDB
period 2026.073612203502
5.55
1.6632e-05
4.554e-08
d
yr
n .1776835737021785 1.4586e-09 deg/d
Q 3.367705267501309 1.843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2383  
   data-arc span      24091 days (65.96 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43419  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:46:29  

Additional Information
 Earth MOID = 1.90137 au 
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456286.5 (2012-Dec-25.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0731311810036155 3.9203e-08  
q 2.9008366260262 1.2238e-07 au
tp 2456596.351811032566
(2013-Oct-30.85181103)
0.0001535 TDB
node 145.7309504529254 5.2059e-05 deg
peri 47.06125033104549 5.906e-05 deg
i 4.620677861063807 4.0462e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2383  
   data-arc span      24091 days (65.96 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43419  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:46:29  

Additional Information
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.536913639050404E-15 -4.755639387119139E-15 9.948787665186249E-14 2.309897603259184E-16 1.312163185992854E-14 -7.498091930572935E-16
q -4.755639387119139E-15 1.497670302028063E-14 -9.990228063426506E-13 -6.248283300712831E-15 -1.721915758355633E-13 3.424969818013371E-15
tp 9.948787665186249E-14 -9.990228063426506E-13 2.356308864741537E-8 2.069356474410038E-11 4.305901344774881E-9 -2.336938763968863E-12
node 2.309897603259184E-16 -6.248283300712831E-15 2.069356474410038E-11 2.710104611441218E-9 -2.69743969897022E-9 2.746598870317592E-11
peri 1.312163185992854E-14 -1.721915758355633E-13 4.305901344774881E-9 -2.69743969897022E-9 3.488097434115707E-9 -2.775348723363324E-11
i -7.498091930572935E-16 3.424969818013371E-15 -2.336938763968863E-12 2.746598870317592E-11 -2.775348723363324E-11 1.63719254012511E-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

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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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