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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 80 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02604406253453339 3.6529e-08  
a 3.117780310219282 1.279e-08 au
q 3.036580644850994 1.1478e-07 au
i 15.17383169986209 4.1785e-06 deg
node 75.73862910036267 1.4716e-05 deg
peri 72.69365111175357 8.1615e-05 deg
M 355.2932977966467 7.959e-05 deg
tp 2459026.789414394119
(2020-Jun-26.28941439)
0.00044455 TDB
period 2010.789884930514
5.51
1.2373e-05
3.388e-08
d
yr
n .179034121216718 1.1017e-09 deg/d
Q 3.198979975587569 1.3123e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2785  
   data-arc span      38534 days (105.50 yr)  
   first obs. used      1914-12-19  
   last obs. used      2020-06-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3788  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:23:46  

Additional Information
 Earth MOID = 2.0858 au 
 Jupiter MOID = 1.91198 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 9.9   n/a MPO502162 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. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2004) Minor Planet Bull. 31, 85-88.]
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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