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JPL Small-Body Database Browser
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117997 Irazu (1090 T-2)
Classification: Inner Main-belt Asteroid          SPK-ID: 2117997
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136080400291711 4.9147e-08  
a 1.92828908802856 8.408e-09 au
q 1.709219944127997 9.5677e-08 au
i 19.28896884429361 8.0501e-06 deg
node 359.9296534817211 1.7417e-05 deg
peri 80.17516063098638 4.7216e-05 deg
M 303.5376137876197 3.8679e-05 deg
tp 2458753.895765093396
(2019-Sep-27.39576509)
0.00010499 TDB
period 978.0400570727959
2.68
6.3969e-06
1.751e-08
d
yr
n .368083083506267 2.4075e-09 deg/d
Q 2.147358231929123 9.3633e-09 au
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      16880 days (46.21 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5916  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 09:50:47  

Additional Information
 Earth MOID = .808527 au 
 Jupiter MOID = 3.06005 au 
 T_jup = 3.840 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456393.5 (2013-Apr-11.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1132290872970828 4.9128e-08  
q 1.710150723489521 9.5606e-08 au
tp 2456797.521812706158
(2014-May-20.02181271)
0.00010732 TDB
node 359.9688163901575 1.7415e-05 deg
peri 80.0787583174732 4.7383e-05 deg
i 19.2904083537693 8.05e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      16880 days (46.21 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5916  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 09:50:47  

Additional Information
 Jupiter MOID = 3.06005 au 
 T_jup = 3.840 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.413604407452414E-15 -4.682682733588608E-15 2.856483187973475E-13 1.105223201736177E-14 7.776964034092805E-14 -2.066422882793308E-14
q -4.682682733588608E-15 9.140595366103678E-15 -7.150835571306093E-13 -1.972598872488034E-14 -2.29665194604787E-13 4.03234195122251E-14
tp 2.856483187973475E-13 -7.150835571306093E-13 1.151802612544582E-8 -1.230666871030181E-10 4.742212213394265E-9 -9.187157788687958E-12
node 1.105223201736177E-14 -1.972598872488034E-14 -1.230666871030181E-10 3.032761579633623E-10 -3.34619006456962E-10 -2.307923652711926E-11
peri 7.776964034092805E-14 -2.29665194604787E-13 4.742212213394265E-9 -3.34619006456962E-10 2.245177905694085E-9 1.862944952491189E-11
i -2.066422882793308E-14 4.03234195122251E-14 -9.187157788687958E-12 -2.307923652711926E-11 1.862944952491189E-11 6.480280248104157E-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 16.3   n/a MPO502792  

117997 Irazu           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
This Hungaria minor planet is named for the 3432-m active volcano Irazú in Costa Rica.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-02-14Last Updated: 2014-04-17

Alternate Designations
 1090 T-2 = 1996 EE3 = 2000 VM61 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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