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156 Xanthippe (A875 WA)
Classification: Main-belt Asteroid          SPK-ID: 2000156
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 166 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268090682168332 3.3235e-08  
a 2.728019125979741 8.4972e-09 au
q 2.109279649938576 9.104e-08 au
i 9.780587691442982 3.8308e-06 deg
node 241.832645960708 2.2057e-05 deg
peri 338.3125499349456 2.338e-05 deg
M 209.2866566267975 9.2655e-06 deg
tp 2459689.499245773789
(2022-Apr-19.99924577)
4.3854e-05 TDB
period 1645.771521797895
4.51
7.6893e-06
2.105e-08
d
yr
n .2187423923867173 1.022e-09 deg/d
Q 3.346758602020905 1.0424e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3319  
   data-arc span      43419 days (118.87 yr)  
   first obs. used      1901-09-19  
   last obs. used      2020-08-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4268  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:11:01  

Additional Information
 Earth MOID = 1.10408 au 
 Jupiter MOID = 1.6678 au 
 T_jup = 3.297 
[ 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 8.7   n/a MPO502154 IRAS observations used: 20
diameter diameter 143.346 km 0.903 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 22.132 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Debehogne, H.; De Sanctis, G.; Zappala, V. (1982) Astron. Astrophys. 108, 197-200.]
[Harris, A.W.; Young, J.W. (1989) Icarus 81, 314-364.]
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Pilcher, F. (2019) Minor Planet Bull. 46, 58-60.]
geometric albedo albedo 0.030   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.713   0.016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=10; phase (min.=3.10, mean=10.52, max.=12.83) deg.
U-B UB 0.315   0.037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=11; phase (min.=3.10, mean=9.86, max.=12.83) deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Ch   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)

156 Xanthippe (A875 WA)          Discovered 1875-Nov-22 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 A875 WA = 1936 FG1 = 1942 RP = 1949 BN = A901 SA = A902 VA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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