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JPL Small-Body Database Browser
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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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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 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07964524228841159 2.8212e-08  
a 2.198797024843052 4.8928e-09 au
q 2.023673303056388 6.3017e-08 au
i 3.791198833225397 4.215e-06 deg
node 207.5914692577351 4.4782e-05 deg
peri 258.9005774499201 5.2778e-05 deg
M 330.147351232597 2.9045e-05 deg
tp 2459099.254412201114
9.6196e-05 TDB
period 1190.902310525314
n .3022917974197245 1.009e-09 deg/d
Q 2.373920746629715 5.2825e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2942  
   data-arc span      42835 days (117.28 yr)  
   first obs. used      1902-10-26  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40099  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:28:51  

Additional Information
 Earth MOID = 1.04451 au 
 Jupiter MOID = 2.70542 au 
 T_jup = 3.660 
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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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