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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2007787693028194 3.9967e-08  
a 2.907022262324138 1.1667e-08 au
q 2.323353910158799 1.1788e-07 au
i 12.46784434316051 5.2246e-06 deg
node 252.4238591883727 1.872e-05 deg
peri 127.6023296120207 2.2607e-05 deg
M 68.898618321982 1.3613e-05 deg
tp 2458254.019358072740
(2018-May-15.51935807)
6.768e-05 TDB
period 1810.38508654705
4.96
1.0899e-05
2.984e-08
d
yr
n .198852720714038 1.1972e-09 deg/d
Q 3.490690614489476 1.401e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2053  
   data-arc span      36807 days (100.77 yr)  
   first obs. used      1918-08-03  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44075  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:15:45  

Additional Information
 Earth MOID = 1.3505 au 
 Jupiter MOID = 2.06758 au 
 T_jup = 3.220 
[ 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 10.14   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 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-January); 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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