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89 Julia (A866 PA)
Classification: Main-belt Asteroid          SPK-ID: 2000089
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 117 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1850930212713841 1.8313e-08  
a 2.551206424334476 3.8336e-09 au
q 2.078995919367443 4.6822e-08 au
i 16.13010919865502 6.2838e-07 deg
node 311.552285090378 1.7891e-06 deg
peri 45.10761911278885 6.3278e-06 deg
M 330.4097890785727 8.4729e-06 deg
tp 2459518.838284634363
(2021-Oct-31.33828463)
3.5185e-05 TDB
period 1488.390285061421
4.07
3.3548e-06
9.185e-09
d
yr
n .2418720436522764 5.4518e-10 deg/d
Q 3.023416929301509 4.5432e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2545  
   data-arc span      56608 days (154.98 yr)  
   first obs. used      1866-08-07  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54963  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 06:11:09  

Additional Information
 Earth MOID = 1.09996 au 
 Jupiter MOID = 2.46343 au 
 T_jup = 3.362 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.76   n/a MPO636061 IRAS observations used: 10
magnitude slope G 0.15   n/a PDS3 (MPC 17257) Fit
diameter diameter 145.483 km 1.265 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 11.387 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Schober, H.J.; Lustig, G. (1975) Icarus 25, 339-343.]
[Chiorny, V.G.; Shevchenko, V.G.; Krugly, Yu.N.; Velichko, F.P.; Gaftonyuk, N.M. (2007) Planet. Space Sci. 55, 986-997.]
[Ditteon, R.; Hawkins, S. (2007) Minor Planet Bull. 34, 59-64.]
[Behrend, R. (2009) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Kaasalainen, M.; Herald, D.; Dunham, D.; et al. (2011) Icarus 214, 652-670.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
[Behrend, R. (2017) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Viikinkoski, M.; Marchis, F.; Durech, J.; et al (2017) Astron. Astrophys. 601, A114.]
[Warner, B.D. (2018) Minor Planet Bull. 45, 39-45.]
[Ferrais, M.; Jehin, E.; Manfroid, J.; Moulane, Y.; et al. (2019) Minor Planet Bull. 46, 278-279.]
geometric albedo albedo 0.189   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.859   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=4.36, mean=12.82, max.=24.83) deg.
U-B UB 0.442   0.027 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=8; phase (min.=4.36, mean=12.82, max.=24.83) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B K   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

89 Julia (A866 PA)          Discovered 1866-Aug-06 by Stephan, E. at Marseille
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A866 PA = A893 EA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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