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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 | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1972998238689586 4.199e-08  
a 2.579741176272981 9.6856e-09 au
q 2.070758696566822 1.0838e-07 au
i 12.16185916986735 4.42e-06 deg
node 62.04384533070816 2.1946e-05 deg
peri 46.50333111649102 2.4242e-05 deg
M 284.5746835381998 1.1764e-05 deg
tp 2459317.586148340229
(2021-Apr-13.08614834)
5.0242e-05 TDB
period 1513.43101702855
4.14
8.5233e-06
2.334e-08
d
yr
n .2378701083494504 1.3396e-09 deg/d
Q 3.088723655979141 1.1597e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1867  
   data-arc span      42222 days (115.60 yr)  
   first obs. used      1904-11-13  
   last obs. used      2020-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44201  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:08:08  

Additional Information
 Earth MOID = 1.10694 au 
 Jupiter MOID = 2.1569 au 
 T_jup = 3.367 
[ 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 11.2   n/a MPO452157  
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. 2019-August); 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

[ show close-approach data ]
Alternate Designations
 A875 XA = 1978 TS1 = A904 VB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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