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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1042323121615258 3.6904e-08  
a 3.002743040942687 1.126e-08 au
q 2.6897601909583 1.1095e-07 au
i 3.539831422440211 4.3453e-06 deg
node 335.3503033285372 5.8307e-05 deg
peri 57.70397857416364 6.1215e-05 deg
M 187.3997037245221 1.9155e-05 deg
tp 2460111.702109869562
(2023-Jun-16.20210987)
0.00010254 TDB
period 1900.534162638326
5.20
1.0691e-05
2.927e-08
d
yr
n .189420430885729 1.0655e-09 deg/d
Q 3.315725890927075 1.2434e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3070  
   data-arc span      42804 days (117.19 yr)  
   first obs. used      1903-11-09  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45723  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 19:03:28  

Additional Information
 Earth MOID = 1.69659 au 
 Jupiter MOID = 2.11364 au 
 T_jup = 3.241 
[ 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 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

[ show close-approach data ]
Alternate Designations
 A887 TB = A916 GG = A916 HA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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