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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 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
(2020-Sep-06.75441372)
9.3341e-05 TDB
period 1190.902310655277
3.26
3.8861e-06
1.064e-08
d
yr
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 
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Orbital Elements at Epoch 2456428.5 (2013-May-16.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07916732272989159 2.7857e-08  
q 2.0244564198412 6.2058e-08 au
tp 2456717.477590032898
(2014-Feb-28.97759003)
9.2002e-05 TDB
node 207.6576113428427 4.4703e-05 deg
peri 258.9543671093062 5.2489e-05 deg
i 3.79176871065186 4.1436e-06 deg
  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
 Jupiter MOID = 2.70542 au 
 T_jup = 3.660 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.760327981445014E-16 -1.724513773367542E-15 -3.084564253548243E-13 4.111819077164659E-17 -6.963737770188251E-14 -3.120731263374973E-16
q -1.724513773367542E-15 3.851201332848688E-15 7.684049164164719E-13 -1.029990969967472E-16 1.768898501715207E-13 7.173835097326866E-16
tp -3.084564253548243E-13 7.684049164164719E-13 8.464302029407117E-9 9.987133969821428E-12 2.535153746306038E-9 1.040415541751511E-12
node 4.111819077164659E-17 -1.029990969967472E-16 9.987133969821428E-12 1.998334771374894E-9 -1.990328856118963E-9 -1.244221887055994E-11
peri -6.963737770188251E-14 1.768898501715207E-13 2.535153746306038E-9 -1.990328856118963E-9 2.755066058975026E-9 1.271402124950427E-11
i -3.120731263374973E-16 7.173835097326866E-16 1.040415541751511E-12 -1.244221887055994E-11 1.271402124950427E-11 1.716938057908619E-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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