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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 169 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2268090672460764 3.2917e-08  
a 2.728019125803982 8.4427e-09 au
q 2.109279652450924 9.0275e-08 au
i 9.780587570080224 3.8218e-06 deg
node 241.8326478645991 2.1665e-05 deg
peri 338.3125482487177 2.2995e-05 deg
M 209.2866565928602 9.2621e-06 deg
tp 2459689.499245862351
(2022-Apr-19.99924586)
4.3846e-05 TDB
period 1645.771521638846
4.51
7.64e-06
2.092e-08
d
yr
n .2187423924078568 1.0154e-09 deg/d
Q 3.34675859915704 1.0358e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3460  
   data-arc span      43509 days (119.12 yr)  
   first obs. used      1901-09-19  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42049  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:24  

Additional Information
 Earth MOID = 1.10408 au 
 Jupiter MOID = 1.6678 au 
 T_jup = 3.297 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456128.5 (2012-Jul-20.0) TDB
Reference: JPL 169 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2263623730209586 3.2905e-08  
q 2.109976722516352 9.017e-08 au
tp 2456399.594664145090
(2013-Apr-17.09466415)
3.8756e-05 TDB
node 241.8653900757088 2.1682e-05 deg
peri 338.5026025192343 2.302e-05 deg
i 9.776225438047915 3.8206e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3460  
   data-arc span      43509 days (119.12 yr)  
   first obs. used      1901-09-19  
   last obs. used      2020-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42049  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:51:24  

Additional Information
 Jupiter MOID = 1.6678 au 
 T_jup = 3.297 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.08276674602104E-15 -2.959237288045967E-15 1.962787828672623E-15 -1.263304972614433E-15 -4.193481679240202E-15 -2.926821895408155E-16
q -2.959237288045967E-15 8.130671746904391E-15 3.375241302838488E-14 5.92520997988281E-15 1.447006622092228E-14 1.383935942155235E-15
tp 1.962787828672623E-15 3.375241302838488E-14 1.502007015393839E-9 -7.867862307963261E-13 3.174517714958455E-10 -3.933472585623834E-13
node -1.263304972614433E-15 5.92520997988281E-15 -7.867862307963261E-13 4.700884457407615E-10 -4.62680915228828E-10 -4.773032234282024E-12
peri -4.193481679240202E-15 1.447006622092228E-14 3.174517714958455E-10 -4.62680915228828E-10 5.299296171944244E-10 4.670538929450541E-12
i -2.926821895408155E-16 1.383935942155235E-15 -3.933472585623834E-13 -4.773032234282024E-12 4.670538929450541E-12 1.459694609134284E-11

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. 2020-October); 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

[ show close-approach data ]
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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