Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.

JPL Small-Body Database Browser
Search: [ help ]  
496 Gryphia (A902 UM)
Classification: Main-belt Asteroid          SPK-ID: 2000496
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

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.

[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07948620647833086 2.853e-08  
a 2.198598379321384 4.9804e-09 au
q 2.023840134579721 6.3593e-08 au
i 3.791421728474005 4.226e-06 deg
node 207.5932680492423 4.586e-05 deg
peri 259.0049525340855 5.3744e-05 deg
M 209.0972528821258 2.9028e-05 deg
tp 2459099.627992880643
9.6553e-05 TDB
period 1190.740929962486
n .3023327668860275 1.0273e-09 deg/d
Q 2.373356624063047 5.3763e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2800  
   data-arc span      42766 days (117.09 yr)  
   first obs. used      1902-10-26  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40967  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:08:08  

Additional Information
 Earth MOID = 1.04487 au 
 Jupiter MOID = 2.7071 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 11.61   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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-January); 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 ]
FirstGov 2019-Dec-08 21:57 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin