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897 Lysistrata (A918 PF)
Classification: Main-belt Asteroid          SPK-ID: 2000897
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09453078126983633 4.4931e-08  
a 2.540917735279223 8.1604e-09 au
q 2.300722796620895 1.1469e-07 au
i 14.32998402878195 4.888e-06 deg
node 257.965139660807 1.6686e-05 deg
peri 23.74599884263766 2.7562e-05 deg
M 69.14583197181112 2.2018e-05 deg
tp 2458716.349882850388
(2019-Aug-20.84988285)
9.0304e-05 TDB
period 1479.395637549968
4.05
7.1268e-06
1.951e-08
d
yr
n .2433426129309108 1.1723e-09 deg/d
Q 2.781112673937551 8.9318e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2415  
   data-arc span      37305 days (102.14 yr)  
   first obs. used      1918-08-03  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .38707  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:30:41  

Additional Information
 Earth MOID = 1.29046 au 
 Jupiter MOID = 2.3276 au 
 T_jup = 3.396 
[ 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 10.3   n/a MPO492760 IRAS observations used: 13
diameter diameter 24.337 km 0.277 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.26 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. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kim, M.-J.; Choi, Y.-J.; Moon, H.-K.; Byun, Y.-I.; et al. (2014) Astron. J. 147, A56.]
[Mas, V.; Fornas, G.; Lozano, J.; Rodrigo, O.; et al. (2018) Minor Planet Bull. 45, 76-82.]
geometric albedo albedo 0.214   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.831   0.017 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.63, mean=5.24, max.=5.85) deg.
U-B UB 0.396   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.63, mean=5.24, max.=5.85) 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 Sl   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)

897 Lysistrata (A918 PF)          Discovered 1918-Aug-03 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A918 PF = 1950 KJ = 1970 KA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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