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JPL Small-Body Database Browser
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11 Parthenope
Classification: Main-belt Asteroid          SPK-ID: 2000011
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09982331519407241 3.0687e-08  
a 2.452389779437578 2.4094e-09 au
q 2.207584101506059 7.5664e-08 au
i 4.631824772294455 3.4188e-06 deg
node 125.5283793492349 2.4844e-05 deg
peri 195.3590505295931 2.7791e-05 deg
M 21.70182201529093 1.2035e-05 deg
tp 2458915.937781211910
(2020-Mar-07.43778121)
4.6873e-05 TDB
period 1402.757738141203
3.84
2.0672e-06
5.66e-09
d
yr
n .2566373296054931 3.782e-10 deg/d
Q 2.697195457369097 2.6499e-09 au
  Orbit Determination Parameters
   # obs. used (total)      5496  
   data-arc span      61755 days (169.08 yr)  
   first obs. used      1850-09-17  
   last obs. used      2019-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46367  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:13:53  

Additional Information
 Earth MOID = 1.19498 au 
 Jupiter MOID = 2.54862 au 
 T_jup = 3.483 
[ hide covariance matrix ]
Orbital Elements at Epoch 2451700.5 (2000-Jun-05.0) TDB
Reference: JPL 106 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09905992318458931 3.0281e-08  
q 2.209895348201435 7.4617e-08 au
tp 2451895.799764343000
(2000-Dec-17.29976434)
4.7561e-05 TDB
node 125.6564217183135 2.4933e-05 deg
peri 194.3271412928974 2.7995e-05 deg
i 4.621879707848567 3.4146e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      5496  
   data-arc span      61755 days (169.08 yr)  
   first obs. used      1850-09-17  
   last obs. used      2019-10-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46367  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:13:53  

Additional Information
 Jupiter MOID = 2.54862 au 
 T_jup = 3.483 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.169243077777829E-16 -2.258568995156216E-15 -5.411407561006355E-13 2.888484766039756E-15 -1.264452565132435E-13 -9.936168268996316E-16
q -2.258568995156216E-15 5.56765913731607E-15 1.325742362844542E-12 -7.407848701704207E-15 3.096611078115729E-13 2.515109984047359E-15
tp -5.411407561006355E-13 1.325742362844542E-12 2.262026482351873E-9 -8.071291897760937E-14 6.071172515646811E-10 7.615123760458585E-13
node 2.888484766039756E-15 -7.407848701704207E-15 -8.071291897760937E-14 6.216390811415293E-10 -6.193650194172718E-10 -1.647008078397945E-11
peri -1.264452565132435E-13 3.096611078115729E-13 6.071172515646811E-10 -6.193650194172718E-10 7.837069765444812E-10 1.659674760410434E-11
i -9.936168268996316E-16 2.515109984047359E-15 7.615123760458585E-13 -1.647008078397945E-11 1.659674760410434E-11 1.165942148747655E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.5   n/a MPO492748 IRAS observations used: 11
diameter diameter 142.887 km 1.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 13.7204 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Lang, K.; Hansen, A.T. (1999) Minor Planet Bull. 26, 15-18.]
[Stephens, R.D.; Warner, B.D.; Harris, A.W.; Shepard, M.K. (2008) Bull. Amer. Astron. Soc. 40, #28.16.]
[Pilcher, F. (2010) Minor Planet Bull. 37, 119-122.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2011) Minor Planet Bull. 38, 183-185.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
geometric albedo albedo 0.191   0.021 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.837   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=6.57, mean=18.28, max.=25.56) deg.
U-B UB 0.417   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=6.57, mean=17.81, max.=25.56) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B Sk   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)

11 Parthenope          Discovered 1850-May-11 by De Gasparis, A. at Naples
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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