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977 Philippa (A922 GA)
Classification: Main-belt Asteroid          SPK-ID: 2000977
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02585578746034452 3.6011e-08  
a 3.117115805109025 1.2675e-08 au
q 3.036520321362845 1.1284e-07 au
i 15.1737184665732 4.109e-06 deg
node 75.73246812924566 1.4693e-05 deg
peri 72.43679497685569 8.1768e-05 deg
M 31.36044050600572 7.9636e-05 deg
tp 2459025.391395778858
(2020-Jun-24.89139578)		 0.00044469 TDB
period 2010.147067530465
5.50		 1.2261e-05
3.357e-08		 d
yr
n .1790913738676207 1.0924e-09 deg/d
Q 3.197711288855204 1.3003e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2935  
   data-arc span      38753 days (106.10 yr)  
   first obs. used      1914-12-19  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .37166  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 00:51:26  

Additional Information
 Earth MOID = 2.08531 au 
 Jupiter MOID = 1.91194 au 
 T_jup = 3.163 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.93   n/a E2021B10 IRAS observations used: 19
diameter diameter 65.471 km 0.237 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 15.405 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2004) Minor Planet Bull. 31, 85-88.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.051   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.712   0.010 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=3; phase (min.=5.73, mean=6.86, max.=8.77) deg.
U-B UB 0.370   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=8.77 deg.
Tholen spectral type spec_T C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

977 Philippa (A922 GA)          Discovered 1922-Apr-06 by Jekhovsky, B. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A922 GA = A914 YA = A919 XA 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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