Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
1009 Sirene (1923 PE)
Classification: Mars-crossing Asteroid          SPK-ID: 2001009
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4569584992692359 9.8022e-08  
a 2.621979639689523 6.0339e-09 AU
q 1.423843758422507 2.5687e-07 AU
i 15.78164629286226 1.4607e-05 deg
node 229.4685343391487 3.8462e-05 deg
peri 186.3895822904081 4.136e-05 deg
M 92.97357083078734 1.1884e-05 deg
tp 2456400.002868601339
(2013-Apr-17.50286860)
5.1557e-05 JED
period 1550.752176292389
4.25
5.3531e-06
1.466e-08
d
yr
n .2321454101458719 8.0135e-10 deg/d
Q 3.82011552095654 8.7912e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      422  
   data-arc span      32936 days (90.17 yr)  
   first obs. used      1923-10-31  
   last obs. used      2014-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .67576  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jan-21 20:51:55  

Additional Information
 Earth MOID = .435075 AU 
 T_jup = 3.200 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO265961  

1009 Sirene (1923 PE)          Discovered 1923-Oct-31 by Reinmuth, K. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2014-Apr-17 15:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Donald K. Yeomans
Webmaster  Alan B. Chamberlin