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9956 Castellaz (1991 TX4)
Classification: Main-belt Asteroid          SPK-ID: 2009956
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1438136952368892 6.8275e-09  
a 2.213419962610247 5.9281e-09 au
q 1.89509985867617 1.392e-08 au
i 5.835788558702892 3.8051e-07 deg
node 357.879056204367 3.6347e-06 deg
peri 116.5998643149117 1.1913e-05 deg
M 297.3694737500912 9.8747e-06 deg
tp 2459605.755904265804
(2022-Jan-26.25590427)
3.3376e-05 TDB
period 1202.802052709867
3.29
4.8321e-06
1.323e-08
d
yr
n .2993011187409714 1.2024e-09 deg/d
Q 2.531740066544323 6.7806e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2404  
   data-arc span      10877 days (29.78 yr)  
   first obs. used      1991-10-05  
   last obs. used      2021-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4669  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 12:51:12  

Additional Information
 Earth MOID = .920067 au 
 Jupiter MOID = 2.55651 au 
 T_jup = 3.635 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457194.5 (2015-Jun-21.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1437565657141891 6.8234e-09  
q 1.895670009176279 1.3925e-08 au
tp 2457197.735618434132
(2015-Jun-24.23561843)
3.0037e-05 TDB
node 357.9917982304237 3.6408e-06 deg
peri 116.1189072616644 1.1922e-05 deg
i 5.832993758560177 3.8017e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2404  
   data-arc span      10877 days (29.78 yr)  
   first obs. used      1991-10-05  
   last obs. used      2021-07-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4669  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 12:51:12  

Additional Information
 Jupiter MOID = 2.55651 au 
 T_jup = 3.635 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.65594170550378E-17 -8.949474667786353E-17 6.655953731491147E-15 6.882834245268271E-15 -4.233675908991307E-15 6.501986177795505E-16
q -8.949474667786353E-17 1.938985841898278E-16 1.57857047859426E-14 -1.70373446646105E-14 2.06800942972383E-14 -1.339853791591308E-15
tp 6.655953731491147E-15 1.57857047859426E-14 9.022101560943317E-10 -6.960285956811767E-11 3.506371366906015E-10 2.205587024320648E-12
node 6.882834245268271E-15 -1.70373446646105E-14 -6.960285956811767E-11 1.32554957074098E-11 -3.361354340343727E-11 -8.294088904039983E-14
peri -4.233675908991307E-15 2.06800942972383E-14 3.506371366906015E-10 -3.361354340343727E-11 1.421348237163511E-10 7.817866585527508E-13
i 6.501986177795505E-16 -1.339853791591308E-15 2.205587024320648E-12 -8.294088904039983E-14 7.817866585527508E-13 1.445280624181591E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.27   n/a E2021B10  
diameter diameter 3.755 km 0.554 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.315   0.147 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9956 Castellaz           Discovered 1991 Oct. 5 by L. D. Schmadel and F. Borngen at Tautenburg.
German physicist Peter Castellaz (b. 1965) works in the Department of Science and Arts of the state of Baden-Württemberg. A specialist for fundamental aspects in research, he was instrumental in the support of work on minor planets at the Astronomisches Rechen-Institut. The name was suggested by L. D. Schmadel.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1991 TX4 = 1994 RG12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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