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269 Justitia (A887 SA)
Classification: Main-belt Asteroid          SPK-ID: 2000269
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 87 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2130133860549961 1.8537e-08  
a 2.61686060622404 6.8029e-09 au
q 2.059434267658327 4.7196e-08 au
i 5.477864799621334 6.4412e-07 deg
node 156.7128127455466 2.3976e-06 deg
peri 119.6403099333652 5.4299e-06 deg
M 232.172298286937 7.312e-06 deg
tp 2459749.524583104609
(2022-Jun-19.02458310)
3.2844e-05 TDB
period 1546.212966899185
4.23
6.0294e-06
1.651e-08
d
yr
n .2328269182232724 9.079e-10 deg/d
Q 3.174286944789752 8.252e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3678  
   data-arc span      47885 days (131.10 yr)  
   first obs. used      1890-02-11  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40305  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:08:32  

Additional Information
 Earth MOID = 1.04796 au 
 Jupiter MOID = 1.98532 au 
 T_jup = 3.368 
[ 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 9.74   n/a MPCxxxxx  
diameter diameter 50.728 km 0.236 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 33.128 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pilcher, F. (2016) Minor Planet Bull. 43, 135-136.]
geometric albedo albedo 0.061   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B Ld   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)

269 Justitia (A887 SA)          Discovered 1887-Sep-21 by Palisa, J. at Vienna
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A887 SA = 1942 XY 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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