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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 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02585578554011823 1.9077e-08  
a 3.117115823539856 1.2157e-08 au
q 3.0365203453027 5.6227e-08 au
i 15.17371307939685 9.0675e-07 deg
node 75.73247920144567 2.1569e-06 deg
peri 72.43677777559685 3.9757e-05 deg
M 31.36044479400132 3.8156e-05 deg
tp 2459025.391370282729
(2020-Jun-24.89137028)
0.00021311 TDB
period 2010.147085358812
5.50
1.176e-05
3.22e-08
d
yr
n .179091372279228 1.0477e-09 deg/d
Q 3.197711301777011 1.2472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3035  
   data-arc span      38803 days (106.24 yr)  
   first obs. used      1914-12-19  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36895  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:44:50  

Additional Information
 Earth MOID = 2.08531 au 
 Jupiter MOID = 1.91194 au 
 T_jup = 3.163 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456510.5 (2013-Aug-06.0) TDB
Reference: JPL 86 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02867073450688792 1.736e-08  
q 3.026940752432742 5.107e-08 au
tp 2457047.680021490189
(2015-Jan-25.18002149)
0.00021016 TDB
node 75.88414246741978 2.1503e-06 deg
peri 78.45930250668584 3.9213e-05 deg
i 15.20129869090658 9.0761e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3035  
   data-arc span      38803 days (106.24 yr)  
   first obs. used      1914-12-19  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .36895  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:44:50  

Additional Information
 Jupiter MOID = 1.91194 au 
 T_jup = 3.163 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.013726983619811E-16 -8.663501028290359E-16 -2.731316020107863E-12 5.269113799851541E-15 -5.265305700901352E-13 1.202949170048224E-15
q -8.663501028290359E-16 2.608126763640751E-15 8.197896004826625E-12 -1.730468095130921E-14 1.582014949635472E-12 -3.458977040503446E-15
tp -2.731316020107863E-12 8.197896004826625E-12 4.41689185822839E-8 6.404919501071726E-11 8.228069497519176E-9 -2.140033248538834E-11
node 5.269113799851541E-15 -1.730468095130921E-14 6.404919501071726E-11 4.623712087380963E-12 7.795725514494808E-12 -1.108393721533176E-12
peri -5.265305700901352E-13 1.582014949635472E-12 8.228069497519176E-9 7.795725514494808E-12 1.537632609043334E-9 -2.948354628830963E-12
i 1.202949170048224E-15 -3.458977040503446E-15 -2.140033248538834E-11 -1.108393721533176E-12 -2.948354628830963E-12 8.237567889758194E-13

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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