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157 Dejanira (A875 XA)
Classification: Main-belt Asteroid          SPK-ID: 2000157
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1974197215114991 3.7155e-08  
a 2.580238455823376 7.6926e-09 au
q 2.070848498441464 9.8179e-08 au
i 12.16119846559088 4.2051e-06 deg
node 62.04524544313453 1.5644e-05 deg
peri 46.46709954188015 1.8605e-05 deg
M 332.1830408765374 9.3372e-06 deg
tp 2459317.475616816491
(2021-Apr-12.97561682)
3.9331e-05 TDB
period 1513.868639164716
4.14
6.7701e-06
1.854e-08
d
yr
n .237801345959998 1.0635e-09 deg/d
Q 3.089628413205287 9.2113e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2468  
   data-arc span      42500 days (116.36 yr)  
   first obs. used      1904-11-13  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40273  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 17:56:49  

Additional Information
 Earth MOID = 1.10682 au 
 Jupiter MOID = 2.15608 au 
 T_jup = 3.366 
[ 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 11.27   n/a E2021B10  
diameter diameter 19.959 km 2.476 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 15.825 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2005) Minor Planet Bull. 32, 90-92.]
[Pilcher, F. (2009) Minor Planet Bull. 36, 100-102.]
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.173   0.089 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

157 Dejanira (A875 XA)          Discovered 1875-Dec-01 by Borrelly, A. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A875 XA = 1978 TS1 = A904 VB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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