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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07472218695424553 3.8074e-08  
a 3.133558898789716 1.6704e-08 au
q 2.899412524922211 1.1817e-07 au
i 4.622023510220801 3.9624e-06 deg
node 145.6638266610784 5.0975e-05 deg
peri 49.06415962263157 5.7782e-05 deg
M 65.75423201187137 2.5848e-05 deg
tp 2458630.436349113873
(2019-May-26.93634911)
0.00014606 TDB
period 2026.073611428592
5.55
1.6201e-05
4.436e-08
d
yr
n .1776835737701369 1.4208e-09 deg/d
Q 3.367705272657221 1.7952e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2502  
   data-arc span      24207 days (66.28 yr)  
   first obs. used      1954-07-03  
   last obs. used      2020-10-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42513  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:08:22  

Additional Information
 Earth MOID = 1.90137 au 
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
[ show covariance matrix ]

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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