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JPL Small-Body Database Browser
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9009 Tirso (1984 HJ1)
Classification: Main-belt Asteroid          SPK-ID: 2009009
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1429165300327341 2.9706e-08  
a 2.26394210107222 6.5049e-09 au
q 1.940387351791961 6.6796e-08 au
i 2.989681057368179 3.4014e-06 deg
node 81.53899275079795 6.9122e-05 deg
peri 177.8397017837942 7.0245e-05 deg
M 66.19527889096149 1.2742e-05 deg
tp 2458371.718493142393
(2018-Sep-10.21849314)
4.3897e-05 TDB
period 1244.217772756967
3.41
5.3625e-06
1.468e-08
d
yr
n .2893384163789137 1.247e-09 deg/d
Q 2.587496850352479 7.4346e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1845  
   data-arc span      13007 days (35.61 yr)  
   first obs. used      1984-04-23  
   last obs. used      2019-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47722  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 22:48:08  

Additional Information
 Earth MOID = .924751 au 
 Jupiter MOID = 2.46296 au 
 T_jup = 3.602 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO435785  
diameter diameter 3.503 km 1.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.274   0.145 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9009 Tirso           Discovered 1984 Apr. 23 by V. Zappala at the European Southern Observatory.
Tirso, the scepter of Dionysus, aided the enjoyment of life. As an acronym meaning, in Italian, "all together enjoying, studying, observing", it represents a scientific and cultural circle, where people share experiences for a better understanding of values, with the dissemination of astronomy as the main motivating force.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080520/MPCPages.arcLast Updated: 2008-05-22

Alternate Designations
 1984 HJ1 = 1997 AO23 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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