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JPL Small-Body Database Browser
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1009 Sirene (A923 UE)
Classification: Mars-crossing Asteroid          SPK-ID: 2001009
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4554998300780715 5.7957e-08  
a 2.62517511741801 4.32e-09 au
q 1.429408297508925 1.5118e-07 au
i 15.76967570210664 7.7588e-06 deg
node 229.461495415479 2.0551e-05 deg
peri 186.4287465814497 2.1475e-05 deg
M 150.6122091730933 8.7221e-06 deg
tp 2457950.529682995231
(2017-Jul-16.02968300)
3.7091e-05 TDB
period 1553.587955494372
4.25
3.8349e-06
1.05e-08
d
yr
n .231721672871391 5.7199e-10 deg/d
Q 3.820941937327095 6.2878e-09 au
  Orbit Determination Parameters
   # obs. used (total)      852  
   data-arc span      34990 days (95.80 yr)  
   first obs. used      1923-10-31  
   last obs. used      2019-08-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53101  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:14:03  

Additional Information
 Earth MOID = .441373 au 
 Jupiter MOID = 1.56494 au 
 T_jup = 3.199 
[ 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 13.9   n/a MPO340699  

1009 Sirene (A923 UE)          Discovered 1923-Oct-31 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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