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194 Prokne (A879 FA)
Classification: Main-belt Asteroid          SPK-ID: 2000194
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 132 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .238044494287217 2.8144e-08  
a 2.615586914942037 4.9247e-09 au
q 1.992960850510398 7.3316e-08 au
i 18.51108663806331 3.4443e-06 deg
node 159.2675473833337 1.0384e-05 deg
peri 162.9949789618526 1.2724e-05 deg
M 8.815520021997955 8.6834e-06 deg
tp 2458962.664663895153
(2020-Apr-23.16466390)
3.7219e-05 TDB
period 1545.084233687435
4.23
4.3637e-06
1.195e-08
d
yr
n .2329970056977662 6.5803e-10 deg/d
Q 3.238212979373676 6.0969e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2863  
   data-arc span      51739 days (141.65 yr)  
   first obs. used      1879-03-22  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:42  

Additional Information
 Earth MOID = .987698 au 
 Jupiter MOID = 2.17109 au 
 T_jup = 3.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454582.5 (2008-Apr-26.0) TDB
Reference: JPL 132 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2357561857145364 2.81e-08  
q 2.000413827246551 7.3021e-08 au
tp 2454324.646346623897
(2007-Aug-12.14634662)
3.449e-05 TDB
node 159.4816984170064 1.0393e-05 deg
peri 162.9095037275848 1.2804e-05 deg
i 18.48518562496967 3.4436e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2863  
   data-arc span      51739 days (141.65 yr)  
   first obs. used      1879-03-22  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48227  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:42  

Additional Information
 Jupiter MOID = 2.17109 au 
 T_jup = 3.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.895935946012334E-16 -2.049224658674199E-15 1.25331027043408E-13 -7.115945237627327E-16 4.896684034741717E-14 1.886236962255913E-15
q -2.049224658674199E-15 5.332036553271702E-15 -3.180139242829223E-13 1.960279285255212E-15 -1.255202039654039E-13 -4.763160626031123E-15
tp 1.25331027043408E-13 -3.180139242829223E-13 1.189572217762804E-9 -6.333071987402686E-12 2.70567872079189E-10 2.209626185248891E-12
node -7.115945237627327E-16 1.960279285255212E-15 -6.333071987402686E-12 1.080105355563806E-10 -1.034361556185569E-10 9.265633353736716E-12
peri 4.896684034741717E-14 -1.255202039654039E-13 2.70567872079189E-10 -1.034361556185569E-10 1.639524333363939E-10 -8.223950836730376E-12
i 1.886236962255913E-15 -4.763160626031123E-15 2.209626185248891E-12 9.265633353736716E-12 -8.223950836730376E-12 1.185838164206119E-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 7.8   n/a MPO492750 IRAS observations used: 9
diameter diameter 161.667 km 1.252 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 15.679 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Scaltriti, F.; Zappala, V. (1979) Icarus 39, 124-130.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2010) Minor Planet Bull. 37, 119-122.]
[Pilcher, F. (2011) Minor Planet Bull. 38, 183-185.]
[Behrend, R. (2019) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2019) Minor Planet Bull. 46, 445-448.]
geometric albedo albedo 0.057   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.724   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=10.24, mean=17.56, max.=25.12) deg.
U-B UB 0.341   0.011 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=10.24, mean=15.04, max.=17.62) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

194 Prokne (A879 FA)          Discovered 1879-Mar-21 by Peters, C. H. F. at Clinton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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