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496 Gryphia (A902 UM)
Classification: Main-belt Asteroid          SPK-ID: 2000496
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07964524205785503 2.7918e-08  
a 2.198797025003023 4.7833e-09 au
q 2.023673303710565 6.2247e-08 au
i 3.791198428779756 4.1416e-06 deg
node 207.5914706439965 4.473e-05 deg
peri 258.9005763880714 5.239e-05 deg
M 330.1473507752549 2.8186e-05 deg
tp 2459099.254413724807
9.3341e-05 TDB
period 1190.902310655277
n .3022917973867352 9.8642e-10 deg/d
Q 2.37392074629548 5.1643e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3054  
   data-arc span      43104 days (118.01 yr)  
   first obs. used      1902-10-26  
   last obs. used      2020-10-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39771  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:28:57  

Additional Information
 Earth MOID = 1.04451 au 
 Jupiter MOID = 2.70542 au 
 T_jup = 3.660 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO502157 IRAS observations used: 2
diameter diameter 14.403 km 0.394 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 1072. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Franco, L.; Pravec, P. (2017) Minor Planet Bull. 44, 270-274.]
geometric albedo albedo 0.193   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
B-V BV 0.861   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.67 deg.
U-B UB 0.507   0.026 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.67 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

496 Gryphia (A902 UM)          Discovered 1902-Oct-25 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A902 UM = 1931 TB = 1931 TN2 = 1933 FQ = 1936 CB = 1951 WS2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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