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268344 (2005 SD178)
Classification: Main-belt Asteroid          SPK-ID: 2268344
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08726889572130829 5.3456e-08  
a 2.375960240332814 2.0651e-08 au
q 2.168612813881235 1.2673e-07 au
i 2.82089753620495 5.3933e-06 deg
node 298.0377448276183 0.00015272 deg
peri 311.7371946253567 0.00015789 deg
M 115.8055141744964 4.007e-05 deg
tp 2458570.187543031049
(2019-Mar-27.68754303)
0.00014887 TDB
period 1337.695235093896
3.66
1.744e-05
4.775e-08
d
yr
n .2691195950733358 3.5087e-09 deg/d
Q 2.583307666784393 2.2454e-08 au
  Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      6520 days (17.85 yr)  
   first obs. used      2000-03-11  
   last obs. used      2018-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62142  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:47:06  

Additional Information
 Earth MOID = 1.15563 au 
 Jupiter MOID = 2.4396 au 
 T_jup = 3.535 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456653.5 (2013-Dec-27.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08704600551696029 5.3728e-08  
q 2.170555909394398 1.2753e-07 au
tp 2457231.267733201878
(2015-Jul-27.76773320)
0.00015048 TDB
node 298.0999982692882 0.00015279 deg
peri 311.5284109075599 0.00015797 deg
i 2.81973495828024 5.3894e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      165  
   data-arc span      6520 days (17.85 yr)  
   first obs. used      2000-03-11  
   last obs. used      2018-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62142  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 04:47:06  

Additional Information
 Jupiter MOID = 2.4396 au 
 T_jup = 3.535 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.886683481302509E-15 -6.776728068530377E-15 -2.98455149734438E-12 -4.932234789146955E-14 -7.525413099370957E-13 -2.099449388018251E-15
q -6.776728068530377E-15 1.62636955832711E-14 6.760938118101236E-12 1.157429416522026E-13 1.660905810138022E-12 5.137195396157105E-15
tp -2.98455149734438E-12 6.760938118101236E-12 2.264377624398156E-8 1.06546016298409E-10 6.098139249728032E-9 3.050358325512701E-12
node -4.932234789146955E-14 1.157429416522026E-13 1.06546016298409E-10 2.334531598807017E-8 -2.328802500240656E-8 1.659282756950346E-10
peri -7.525413099370957E-13 1.660905810138022E-12 6.098139249728032E-9 -2.328802500240656E-8 2.495408992175936E-8 -1.649252675646648E-10
i -2.099449388018251E-15 5.137195396157105E-15 3.050358325512701E-12 1.659282756950346E-10 -1.649252675646648E-10 2.904528490224511E-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 17.3   n/a MPO433742  

268344 (2005 SD178)          Discovered 2005-Sep-29 by Spacewatch at Kitt Peak
Reference: 20110319/Numbers.arcLast Updated: 2011-03-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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