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172450 (2003 QR78)
Classification: Main-belt Asteroid          SPK-ID: 2172450
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2521424370828954 5.6356e-08  
a 2.341330444775786 1.3995e-08 au
q 1.75098168041364 1.3697e-07 au
i 3.999922348665437 5.0311e-06 deg
node 253.7533576322132 7.7808e-05 deg
peri 108.5564712915012 7.8536e-05 deg
M 245.6771847249551 1.7012e-05 deg
tp 2459416.049635184459
(2021-Jul-20.54963518)
6.4995e-05 TDB
period 1308.556549333511
3.58
1.1733e-05
3.212e-08
d
yr
n .2751122984966598 2.4667e-09 deg/d
Q 2.931679209137932 1.7524e-08 au
  Orbit Determination Parameters
   # obs. used (total)      557  
   data-arc span      15125 days (41.41 yr)  
   first obs. used      1978-11-30  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53515  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:18:42  

Additional Information
 Earth MOID = .753638 au 
 Jupiter MOID = 2.54985 au 
 T_jup = 3.517 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457179.5 (2015-Jun-06.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2506788963557137 5.6194e-08  
q 1.755776000985586 1.3636e-07 au
tp 2456796.665964800512
(2014-May-19.16596480)
4.6997e-05 TDB
node 253.9795772085634 7.7879e-05 deg
peri 108.1510575951661 7.8625e-05 deg
i 3.99645438327291 5.0234e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      557  
   data-arc span      15125 days (41.41 yr)  
   first obs. used      1978-11-30  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53515  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:18:42  

Additional Information
 Jupiter MOID = 2.54985 au 
 T_jup = 3.517 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.157738108002558E-15 -7.64427570930549E-15 -6.688656737869538E-13 2.55636874192344E-14 -1.354826030924913E-13 -3.287792068394213E-15
q -7.64427570930549E-15 1.859476510480998E-14 1.907457472572894E-12 -5.698007161830379E-14 3.939303337759398E-13 8.271641622718981E-15
tp -6.688656737869538E-13 1.907457472572894E-12 2.208714219615794E-9 9.607672503473503E-12 5.438361965247836E-10 2.63473785177127E-12
node 2.55636874192344E-14 -5.698007161830379E-14 9.607672503473503E-12 6.065133442389626E-9 -6.046825888496107E-9 -9.614739565068832E-11
peri -1.354826030924913E-13 3.939303337759398E-13 5.438361965247836E-10 -6.046825888496107E-9 6.181886646011544E-9 9.65343501481487E-11
i -3.287792068394213E-15 8.271641622718981E-15 2.63473785177127E-12 -9.614739565068832E-11 9.65343501481487E-11 2.523458695121612E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO352052  
diameter diameter 1.667 km 0.225 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.366   0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

172450 (2003 QR78)          Discovered 2003-Aug-24 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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Alternate Designations
 2003 QR78 = 1978 WG19 = 1985 SD5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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