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JPL Small-Body Database Browser
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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07472222526325045 3.9931e-08  
a 3.133558890768946 1.8014e-08 au
q 2.899412397457248 1.2527e-07 au
i 4.622022245425262 4.1989e-06 deg
node 145.663844368497 5.2983e-05 deg
peri 49.06418615963107 5.978e-05 deg
M 65.75418593738286 2.6532e-05 deg
tp 2458630.436609841118
(2019-May-26.93660984)
0.00014982 TDB
period 2026.073603649576
5.55
1.7471e-05
4.783e-08
d
yr
n .1776835744523448 1.5322e-09 deg/d
Q 3.367705384080645 1.9361e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2216  
   data-arc span      23688 days (64.85 yr)  
   first obs. used      1954-07-03  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43697  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 21:35:23  

Additional Information
 Earth MOID = 1.90137 au 
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456109.5 (2012-Jul-01.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07309442953867967 3.991e-08  
q 2.902052863715205 1.2465e-07 au
tp 2456594.874843536504
(2013-Oct-29.37484354)
0.00015686 TDB
node 145.7384205395341 5.3047e-05 deg
peri 46.73565596589153 6.0137e-05 deg
i 4.61985732173772 4.1974e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2216  
   data-arc span      23688 days (64.85 yr)  
   first obs. used      1954-07-03  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43697  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 21:35:23  

Additional Information
 Jupiter MOID = 1.59397 au 
 T_jup = 3.203 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.592843869347789E-15 -4.92789015848856E-15 1.646238901862843E-13 -5.859608880253647E-16 2.691852372467844E-14 -7.538034284013503E-16
q -4.92789015848856E-15 1.553828172958687E-14 -1.149000252213067E-12 -5.657148030791293E-15 -2.07975287213815E-13 3.430588308775901E-15
tp 1.646238901862843E-13 -1.149000252213067E-12 2.460400048105381E-8 2.651231965460318E-11 4.467532739154531E-9 -2.02726556508029E-12
node -5.859608880253647E-16 -5.657148030791293E-15 2.651231965460318E-11 2.813945140770399E-9 -2.79986662611025E-9 2.4325298607059E-11
peri 2.691852372467844E-14 -2.07975287213815E-13 4.467532739154531E-9 -2.79986662611025E-9 3.616398655274437E-9 -2.456607921580492E-11
i -7.538034284013503E-16 3.430588308775901E-15 -2.02726556508029E-12 2.4325298607059E-11 -2.456607921580492E-11 1.761853858491486E-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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