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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07728461615750508 2.1213e-08  
a 3.134487745154737 1.5761e-08 au
q 2.892240062920049 6.4679e-08 au
i 4.634594979653794 4.0109e-07 deg
node 145.6000423977108 1.7686e-06 deg
peri 49.83691601316833 9.6899e-06 deg
M 135.0796305337788 1.1717e-05 deg
tp 2458635.936193405890
(2019-Jun-01.43619341)
6.3396e-05 TDB
period 2026.974528224009
5.55
1.5288e-05
4.186e-08
d
yr
n .1776045998542587 1.3395e-09 deg/d
Q 3.376735427389424 1.6979e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2687  
   data-arc span      24508 days (67.10 yr)  
   first obs. used      1954-07-03  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42412  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 08:46:40  

Additional Information
 Earth MOID = 1.89483 au 
 Jupiter MOID = 1.58328 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456714.5 (2014-Feb-26.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0734093196906625 2.1267e-08  
q 2.900473761616898 6.4661e-08 au
tp 2456597.282754620805
(2013-Oct-31.78275462)
6.2339e-05 TDB
node 145.7267735381687 1.7757e-06 deg
peri 47.26109745658975 1.0211e-05 deg
i 4.620639951467467 4.0024e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2687  
   data-arc span      24508 days (67.10 yr)  
   first obs. used      1954-07-03  
   last obs. used      2021-08-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42412  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 08:46:40  

Additional Information
 Jupiter MOID = 1.58328 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.522768959302318E-16 -1.345380168892524E-15 2.354869815300651E-13 3.532407366862042E-15 -1.395525768029564E-15 -7.478189085286232E-16
q -1.345380168892524E-15 4.181038064635573E-15 -5.485608415051828E-13 -1.087015478476724E-14 3.904471504668386E-14 2.17122398675261E-15
tp 2.354869815300651E-13 -5.485608415051828E-13 3.886099674169693E-9 2.984906927037638E-11 6.16365549312284E-10 -7.805230196533803E-12
node 3.532407366862042E-15 -1.087015478476724E-14 2.984906927037638E-11 3.153172215825293E-12 1.980396533013188E-12 -3.291454256887726E-13
peri -1.395525768029564E-15 3.904471504668386E-14 6.16365549312284E-10 1.980396533013188E-12 1.042719604257766E-10 -9.154715457756428E-13
i -7.478189085286232E-16 2.17122398675261E-15 -7.805230196533803E-12 -3.291454256887726E-13 -9.154715457756428E-13 1.601883550968424E-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 11.71   n/a MPO636100  
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

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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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