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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 137 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .226881357086773 4.4066e-08  
a 2.727845781294024 9.9814e-09 AU
q 2.108948428510607 1.2122e-07 AU
i 9.775922949340801 5.4267e-06 deg
node 241.8512046167716 2.4416e-05 deg
peri 338.4238709432192 2.5717e-05 deg
M 131.4890168536171 8.2763e-06 deg
tp 2456399.443739524708
(2013-Apr-16.94373952)
3.748e-05 JED
period 1645.614660059364
4.51
9.0322e-06
2.473e-08
d
yr
n .2187632431440622 1.2007e-09 deg/d
Q 3.34674313407744 1.2246e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1513  
   data-arc span      41190 days (112.77 yr)  
   first obs. used      1901-09-19  
   last obs. used      2014-06-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56315  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Aug-13 13:51:30  

Additional Information
 Earth MOID = 1.10523 AU 
 T_jup = 3.297 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.64 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20
diameter diameter 120.99 km 2.5 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20
rotation period rot_per 22.37 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) 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]
geometric albedo albedo 0.0422   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 20
B-V BV .713 mag .016 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=10; phase (min.=3.10, mean=10.52, max.=12.83) deg.
U-B UB .315 mag .037 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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          Discovered 1875-Nov-22 by Palisa, J. at Pola
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1936 FG1 = 1942 RP = 1949 BN = A901 SA = A902 VA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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