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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456308.5 (2013-Jan-16.0) TDB
Reference: JPL 84 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02880644090138465 3.5538e-08  
q 3.024939912792254 1.1167e-07 au
tp 2457053.019068902229
(2015-Jan-30.51906890)
0.00040492 TDB
node 75.88235937261126 1.4651e-05 deg
peri 79.49535708324993 7.4618e-05 deg
i 15.20209335723887 4.1152e-06 deg
  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
 Jupiter MOID = 1.91194 au 
 T_jup = 3.163 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.262980568377003E-15 -3.94499878370882E-15 -7.543066742462963E-13 1.712824509776985E-16 -1.058076609457896E-13 -1.558582079309543E-15
q -3.94499878370882E-15 1.247088771913587E-14 1.829101762225108E-12 -3.414851592706258E-16 2.237282511737197E-13 5.357100157597137E-15
tp -7.543066742462963E-13 1.829101762225108E-12 1.639581935521195E-7 2.717837159871414E-11 2.964243056338291E-8 7.852514311101293E-12
node 1.712824509776985E-16 -3.414851592706258E-16 2.717837159871414E-11 2.146405316088569E-10 -2.015965449160732E-10 1.548141505875606E-12
peri -1.058076609457896E-13 2.237282511737197E-13 2.964243056338291E-8 -2.015965449160732E-10 5.567793077999227E-9 -1.30992491064005E-13
i -1.558582079309543E-15 5.357100157597137E-15 7.852514311101293E-12 1.548141505875606E-12 -1.30992491064005E-13 1.693501992095332E-11

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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