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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 ]

[ show orbit diagram ]
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
(2020-Sep-06.75441220)
9.6196e-05 TDB
period 1190.902310525314
3.26
3.975e-06
1.088e-08
d
yr
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456320.5 (2013-Jan-28.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07911595770071393 2.8149e-08  
q 2.024613802989727 6.281e-08 au
tp 2456717.479857666898
(2014-Feb-28.97985767)
9.4614e-05 TDB
node 207.6578140198008 4.4755e-05 deg
peri 258.9461816703055 5.2893e-05 deg
i 3.791753572342654 4.217e-06 deg
  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
 Jupiter MOID = 2.70542 au 
 T_jup = 3.660 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.923503702574663E-16 -1.763600873273973E-15 -3.936939756203303E-13 5.931114091064788E-17 -9.35324100598469E-14 -3.447609079562195E-16
q -1.763600873273973E-15 3.945086056357769E-15 9.757020406471512E-13 -1.759934794849214E-16 2.349543029501219E-13 7.908075869838049E-16
tp -3.936939756203303E-13 9.757020406471512E-13 8.951756409177931E-9 1.017654279257631E-11 2.671231201844102E-9 1.157544656078356E-12
node 5.931114091064788E-17 -1.759934794849214E-16 1.017654279257631E-11 2.002972198568375E-9 -1.994896047060163E-9 -1.284180566352014E-11
peri -9.35324100598469E-14 2.349543029501219E-13 2.671231201844102E-9 -1.994896047060163E-9 2.797669726867136E-9 1.314579261930569E-11
i -3.447609079562195E-16 7.908075869838049E-16 1.157544656078356E-12 -1.284180566352014E-11 1.314579261930569E-11 1.778294794012535E-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 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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
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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