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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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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2521424348231425 5.5534e-08  
a 2.341330444631001 1.3967e-08 au
q 1.75098168559619 1.3522e-07 au
i 3.9999222560117 5.0035e-06 deg
node 253.7533463835415 7.1323e-05 deg
peri 108.5564829764115 7.213e-05 deg
M 245.6771845183832 1.6987e-05 deg
tp 2459416.049635896777
(2021-Jul-20.54963590)
6.4919e-05 TDB
period 1308.556549212132
3.58
1.1709e-05
3.206e-08
d
yr
n .2751122985221786 2.4617e-09 deg/d
Q 2.931679203665813 1.7488e-08 au
  Orbit Determination Parameters
   # obs. used (total)      584  
   data-arc span      15181 days (41.56 yr)  
   first obs. used      1978-11-30  
   last obs. used      2020-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53279  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 10:32:08  

Additional Information
 Earth MOID = .753638 au 
 Jupiter MOID = 2.54985 au 
 T_jup = 3.517 
[ show covariance matrix ]

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2051-Apr-04 05:17 00:02 Eunom 0.0425089790494622 0.0425054833026207 0.0425124761862687 2.99327062762775 2.99327051730446 2470265.720474871 1.57704542888456 426.786209425534 33.0707024959598 66.3271733894183 175887.013966434 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 10:32:09 2020-Nov-12 10:32
2072-Sep-24 07:49 00:02 Eunom 0.0417863868983579 0.0417788943258183 0.0417938819861102 3.07814351025586 3.07814340111931 2478109.825655963 1.56332015127764 634.035928940731 35.0960838847823 -54.0747901873927 144097.396759254 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 10:32:09 2020-Nov-12 10:32
2116-Nov-01 15:24 00:14 Hygie 0.0411292305521237 0.0411281606450004 0.0411303005022316 3.12955481764979 3.1295545174784 2494218.141336051 13.8567658834381 242.519129417468 51.0784550031698 -86.3876459584792 119878.985843347 T 18 CATAB v2.0f-lin.ifort 2020-Nov-12 10:32:09 2020-Nov-12 10:32

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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