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271 Penthesilea (A887 TB)
Classification: Main-belt Asteroid          SPK-ID: 2000271
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1042322416869749 9.2981e-09  
a 3.002743054009588 1.0263e-08 au
q 2.689760414280175 3.2606e-08 au
i 3.539832493809608 3.4588e-07 deg
node 335.3502413202473 3.0894e-06 deg
peri 57.70406558047404 1.2133e-05 deg
M 187.3996743576315 1.3722e-05 deg
tp 2460111.702270852916
(2023-Jun-16.20227085)
7.4926e-05 TDB
period 1900.534175044029
5.20
9.744e-06
2.668e-08
d
yr
n .1894204296492906 9.7115e-10 deg/d
Q 3.315725693739001 1.1333e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3196  
   data-arc span      45126 days (123.55 yr)  
   first obs. used      1897-09-02  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4658  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:09:06  

Additional Information
 Earth MOID = 1.69659 au 
 Jupiter MOID = 2.11363 au 
 T_jup = 3.241 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.91   n/a E2021B10 IRAS observations used: 13
diameter diameter 65.901 km 0.176 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 18.787 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2009) Minor Planet Bull. 36, 100-102.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
geometric albedo albedo 0.045   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.724   0.045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.11, mean=5.30, max.=10.93) deg.
U-B UB 0.348   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=2.11, mean=5.30, max.=10.93) deg.
Tholen spectral type spec_T PC   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

271 Penthesilea (A887 TB)          Discovered 1887-Oct-13 by Knorre, V. at Berlin
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A887 TB = A916 GG = A916 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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