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899 Jokaste (A918 PH)
Classification: Main-belt Asteroid          SPK-ID: 2000899
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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2010626784842115 3.6857e-08  
a 2.90597099967886 1.0987e-08 au
q 2.321688686885987 1.0763e-07 au
i 12.46762474742777 4.0406e-06 deg
node 252.4185599649533 1.8538e-05 deg
peri 127.5178471776392 2.1494e-05 deg
M 148.5411660619168 1.3148e-05 deg
tp 2458253.914297307834
(2018-May-15.41429731)
6.3803e-05 TDB
period 1809.403144560931
4.95
1.0262e-05
2.81e-08
d
yr
n .1989606357666397 1.1284e-09 deg/d
Q 3.490253312471733 1.3196e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2557  
   data-arc span      37208 days (101.87 yr)  
   first obs. used      1918-08-03  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4118  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:22:27  

Additional Information
 Earth MOID = 1.34956 au 
 Jupiter MOID = 2.07063 au 
 T_jup = 3.220 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456468.5 (2013-Jun-25.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .197136074259688 3.6888e-08  
q 2.334958893482331 1.0725e-07 au
tp 2456443.130258386330
(2013-May-30.63025839)
6.0759e-05 TDB
node 252.6339284871882 1.8494e-05 deg
peri 127.5914895926864 2.1589e-05 deg
i 12.47585971101796 4.0427e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2557  
   data-arc span      37208 days (101.87 yr)  
   first obs. used      1918-08-03  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4118  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:22:27  

Additional Information
 Jupiter MOID = 2.07063 au 
 T_jup = 3.220 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.36069944040362E-15 -3.943088335069529E-15 4.758172432918323E-13 9.766571145055421E-16 5.36327580350021E-14 3.196013106379964E-15
q -3.943088335069529E-15 1.150241859391713E-14 -1.188825563861639E-12 -3.272975851417784E-15 -1.233501588466949E-13 -9.372305634889876E-15
tp 4.758172432918323E-13 -1.188825563861639E-12 3.691687180539045E-9 -1.284922425238099E-11 6.966614431748272E-10 -5.944954431905579E-13
node 9.766571145055421E-16 -3.272975851417784E-15 -1.284922425238099E-11 3.420108788461679E-10 -3.358909575795163E-10 -1.267963958278145E-12
peri 5.36327580350021E-14 -1.233501588466949E-13 6.966614431748272E-10 -3.358909575795163E-10 4.660870222676723E-10 1.083313451758423E-12
i 3.196013106379964E-15 -9.372305634889876E-15 -5.944954431905579E-13 -1.267963958278145E-12 1.083313451758423E-12 1.634364704043925E-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 10.1   n/a MPO502161 IRAS observations used: 20
diameter diameter 31.018 km 0.243 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 6.245 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2004) Minor Planet Bull. 31, 40-41.]
[Menke, J. (2005) Minor Planet Bull. 32, 85-88.]
[Clark, M. (2006) Minor Planet Bull. 33, 53-56.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Bowens-Rubin, R.; Henderson, P. (2014) Minor Planet Bull. 41, 58-59.]
geometric albedo albedo 0.161   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.676   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.18, mean=5.72, max.=12.70) deg.
U-B UB 0.255   0.038 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=3.18, mean=5.72, max.=12.70) deg.
Tholen spectral type spec_T XB   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

899 Jokaste (A918 PH)          Discovered 1918-Aug-03 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A918 PH = 1953 TL2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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