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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07971143994920728 1.4087e-08  
a 2.198971767765997 4.1271e-09 au
q 2.023688561749716 3.1095e-08 au
i 3.791076888296005 5.9799e-07 deg
node 207.5846971991884 1.0031e-05 deg
peri 258.8368946035151 1.6385e-05 deg
M 30.66195468213295 1.337e-05 deg
tp 2459099.056261964664
(2020-Sep-06.55626196)
4.4144e-05 TDB
period 1191.044278530668
3.26
3.3531e-06
9.18e-09
d
yr
n .3022557653726478 8.5092e-10 deg/d
Q 2.374254973782278 4.456e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3383  
   data-arc span      43248 days (118.41 yr)  
   first obs. used      1902-10-26  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38545  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:29:05  

Additional Information
 Earth MOID = 1.04438 au 
 Jupiter MOID = 2.70461 au 
 T_jup = 3.659 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456811.5 (2014-Jun-03.0) TDB
Reference: JPL 47 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07935036092176885 1.4058e-08  
q 2.024593641605559 3.1036e-08 au
tp 2456716.526497122066
(2014-Feb-28.02649712)
4.2827e-05 TDB
node 207.6281571041684 1.0028e-05 deg
peri 258.651172826813 1.6441e-05 deg
i 3.79102819517102 5.9806e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3383  
   data-arc span      43248 days (118.41 yr)  
   first obs. used      1902-10-26  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .38545  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 18:29:05  

Additional Information
 Jupiter MOID = 2.70461 au 
 T_jup = 3.659 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.976167030303015E-16 -4.330278294459417E-16 -1.167135443719717E-13 7.994997878951733E-14 -1.213056439321054E-13 4.474402350632304E-15
q -4.330278294459417E-16 9.632621494777908E-16 2.84591812831351E-13 -1.729261424919131E-13 2.726264346734364E-13 -9.652247434139247E-15
tp -1.167135443719717E-13 2.84591812831351E-13 1.834172354655772E-9 -4.319487100215023E-11 5.505292510763427E-10 -2.541562263386585E-12
node 7.994997878951733E-14 -1.729261424919131E-13 -4.319487100215023E-11 1.005618462488695E-10 -1.148151169501407E-10 4.741180320636378E-12
peri -1.213056439321054E-13 2.726264346734364E-13 5.505292510763427E-10 -1.148151169501407E-10 2.703020216448949E-10 -5.611038034224342E-12
i 4.474402350632304E-15 -9.652247434139247E-15 -2.541562263386585E-12 4.741180320636378E-12 -5.611038034224342E-12 3.576793866004085E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.78   n/a E2021B10 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. 2020-October); 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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