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JPL Small-Body Database Browser
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91554 (1999 RZ215)
Classification: TransNeptunian Object          SPK-ID: 2091554
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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7009126900712341 0.00016186  
a 103.4374998561847 0.059551 au
q 30.93684357774338 0.0011094 au
i 25.46396954716117 0.00014503 deg
node 341.5882573181045 0.00010819 deg
peri 335.6699604042145 0.0036877 deg
M 7.391911955124153 0.0067706 deg
tp 2451110.632065992961
(1998-Oct-24.13206599)
0.4869 TDB
period 384251.3917219443
1052.02
331.83
0.9085
d
yr
n .0009368866522167516 8.0907e-07 deg/d
Q 175.938156134626 0.10129 au
  Orbit Determination Parameters
   # obs. used (total)      29  
   data-arc span      6639 days (18.18 yr)  
   first obs. used      1999-09-08  
   last obs. used      2017-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .21051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:33:12  

Additional Information
 Earth MOID = 29.9404 au 
 Jupiter MOID = 25.9634 au 
 T_jup = 5.793 
[ hide covariance matrix ]
Orbital Elements at Epoch 2454167.5 (2007-Mar-08.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6978476957102946 0.00016144  
q 30.94023856763651 0.0011126 au
tp 2451075.598974505735
(1998-Sep-19.09897451)
0.49297 TDB
node 341.6382631658716 0.00010785 deg
peri 335.4439846032494 0.0037311 deg
i 25.51235363749926 0.0001453 deg
  Orbit Determination Parameters
   # obs. used (total)      29  
   data-arc span      6639 days (18.18 yr)  
   first obs. used      1999-09-08  
   last obs. used      2017-11-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      3  
   norm. resid. RMS      .21051  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 22:33:12  

Additional Information
 Jupiter MOID = 25.9634 au 
 T_jup = 5.793 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.606342808861593E-8 1.724437331606542E-7 6.624304840738334E-5 6.889876051468638E-10 4.928663235601328E-7 -7.417225097975275E-10
q 1.724437331606542E-7 1.237904580930472E-6 .0005216467753146114 4.539799610211775E-9 3.917874394770716E-6 -4.750644422262305E-9
tp 6.624304840738334E-5 .0005216467753146114 .2430227117206126 1.724525151562202E-6 .001837815624994407 -1.737122284720937E-6
node 6.889876051468638E-10 4.539799610211775E-9 1.724525151562202E-6 1.163157430589722E-8 2.35013087945826E-9 -2.940776570606713E-9
peri 4.928663235601328E-7 3.917874394770716E-6 .001837815624994407 2.35013087945826E-9 1.392092686711493E-5 -1.023732214562868E-8
i -7.417225097975275E-10 -4.750644422262305E-9 -1.737122284720937E-6 -2.940776570606713E-9 -1.023732214562868E-8 2.111218393341715E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.8   n/a MPO366278  

91554 (1999 RZ215)          Discovered 1999-Sep-08 by Luu, J. X., Trujillo, C. A., Jewitt, D. C. at Mauna Kea
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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