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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1975287102372285 3.7018e-08  
a 2.5806067979248 7.6853e-09 au
q 2.07086286550129 9.7812e-08 au
i 12.16039090392433 4.1783e-06 deg
node 62.04186505468076 1.5602e-05 deg
peri 46.44812794200913 1.8546e-05 deg
M 18.80293914993257 9.2708e-06 deg
tp 2459317.413123767975
(2021-Apr-12.91312377)
3.8949e-05 TDB
period 1514.19281935139
4.15
6.7642e-06
1.852e-08
d
yr
n .237750434026102 1.0621e-09 deg/d
Q 3.090350730348309 9.2034e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2604  
   data-arc span      42576 days (116.57 yr)  
   first obs. used      1904-11-13  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40022  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:36:42  

Additional Information
 Earth MOID = 1.10721 au 
 Jupiter MOID = 2.15573 au 
 T_jup = 3.366 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457271.5 (2015-Sep-06.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1951900717634067 3.6861e-08  
q 2.078015570434704 9.7222e-08 au
tp 2457801.780847301795
(2017-Feb-17.28084730)
3.9696e-05 TDB
node 62.0794629023615 1.5598e-05 deg
peri 46.23312946712252 1.8649e-05 deg
i 12.15859243580945 4.1766e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2604  
   data-arc span      42576 days (116.57 yr)  
   first obs. used      1904-11-13  
   last obs. used      2021-06-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40022  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 10:36:42  

Additional Information
 Jupiter MOID = 2.15573 au 
 T_jup = 3.366 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.358762625659772E-15 -3.577256675893002E-15 -3.136028060773536E-13 6.086986438935341E-15 -3.857369867058325E-14 -2.979614875910967E-15
q -3.577256675893002E-15 9.452194194863073E-15 7.916037783951054E-13 -1.678117225578421E-14 9.005097717849409E-14 7.79604787148336E-15
tp -3.136028060773536E-13 7.916037783951054E-13 1.575788375075183E-9 -2.934606638596042E-12 4.118326914070002E-10 3.385635811237565E-12
node 6.086986438935341E-15 -1.678117225578421E-14 -2.934606638596042E-12 2.433061085310087E-10 -2.378051605199458E-10 9.717329174373155E-13
peri -3.857369867058325E-14 9.005097717849409E-14 4.118326914070002E-10 -2.378051605199458E-10 3.478021600710752E-10 -2.160720927112238E-13
i -2.979614875910967E-15 7.79604787148336E-15 3.385635811237565E-12 9.717329174373155E-13 -2.160720927112238E-13 1.744390905260758E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.26   n/a MPO614063  
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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