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148780 Altjira (2001 UQ18)
Classification: TransNeptunian Object          SPK-ID: 2148780
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06638432182734619 5.9323e-05  
a 44.06794086968523 0.0084386 au
q 41.14252050072358 0.009992 au
i 5.196343222821549 0.00015388 deg
node 1.727739360060621 0.0025548 deg
peri 298.1386453481644 0.12668 deg
M 128.9243244565693 0.13506 deg
tp 2420734.336076854270
(1915-Aug-24.83607685)
29.334 TDB
period 106851.9774712732
292.54
30.692
0.08403
d
yr
n .003369146818988771 9.6774e-07 deg/d
Q 46.99336123864688 0.0089988 au
  Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      6580 days (18.02 yr)  
   first obs. used      2001-10-20  
   last obs. used      2019-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .37465  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:05:34  

Additional Information
 Earth MOID = 40.1303 au 
 Jupiter MOID = 36.0217 au 
 T_jup = 5.902 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453918.5 (2006-Jul-02.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06312621810458205 6.2761e-05  
q 41.29007251474027 0.010223 au
tp 2420038.634483505652
(1913-Sep-28.13448351)
30.737 TDB
node 1.951982811278028 0.0025447 deg
peri 296.0199492868168 0.13186 deg
i 5.205413768958967 0.00015492 deg
  Orbit Determination Parameters
   # obs. used (total)      81  
   data-arc span      6580 days (18.02 yr)  
   first obs. used      2001-10-20  
   last obs. used      2019-10-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      4  
   norm. resid. RMS      .37465  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 14:05:34  

Additional Information
 Jupiter MOID = 36.0217 au 
 T_jup = 5.902 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.938903316046867E-9 -5.65647762276921E-7 -.001179908333936511 2.915341718066794E-9 -5.665158163497024E-6 9.914350775491437E-13
q -5.65647762276921E-7 .0001045109508767053 .2867110440144907 -3.81806964959463E-7 .001277036711086862 9.732978960563546E-9
tp -.001179908333936511 .2867110440144907 944.7720203699851 -.0006844720756771517 4.033652549298247 4.950078537431429E-5
node 2.915341718066794E-9 -3.81806964959463E-7 -.0006844720756771517 6.475442735053645E-6 -9.895716860176545E-6 3.829665825724621E-7
peri -5.665158163497024E-6 .001277036711086862 4.033652549298247 -9.895716860176545E-6 .01738802640059953 -1.860211676706024E-7
i 9.914350775491437E-13 9.732978960563546E-9 4.950078537431429E-5 3.829665825724621E-7 -1.860211676706024E-7 2.399930103164518E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.8   n/a MPO502893  

148780 Altjira           Discovered 2001 Oct. 20 by the Deep Ecliptic Survey at Kitt Peak.
According to the mythology of the Arrernte in central Australia, Altjira was the central god of the Dreamtime who created the earth and then retired to the sky.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080819/MPCPages.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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