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69 Hesperia
Classification: Main-belt Asteroid          SPK-ID: 2000069
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 96 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1705010244569249 2.7682e-08  
a 2.976950823806732 7.7222e-09 AU
q 2.469377658589798 8.2191e-08 AU
i 8.585625076064959 3.7628e-06 deg
node 185.026518479439 2.3137e-05 deg
peri 289.7908548230287 2.5494e-05 deg
M 353.3059635603236 1.1664e-05 deg
tp 2457035.385221848032
(2015-Jan-12.88522185)
6.0827e-05 JED
period 1876.099716286974
5.14
7.2999e-06
1.999e-08
d
yr
n .1918874550615482 7.4663e-10 deg/d
Q 3.484523989023666 9.0389e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2125  
   data-arc span      55767 days (152.68 yr)  
   first obs. used      1861-04-29  
   last obs. used      2014-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51053  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:08:40  

Additional Information
 Earth MOID = 1.50158 AU 
 T_jup = 3.222 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 7.05 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
magnitude slope G 0.19   n/a PDS3 (MPC 17257) Fit
diameter diameter 138.13 km 4.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
rotation period rot_per 5.655 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Poutanen, M.; Bowell, E.; Martin, L.J.; Thompson, D.T. (1985) Astron. Astrophys. Suppl. Ser. 61, 291-297.]
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Velichko, F.P.; Krugly, Yu.N. (1989) In "Methods of investigation of movement, physics and dynamic of Solar System small bodies, Dushanbe, p. 14-15 (in Russian).]
[Hainaut-Rouelle, M.-C.; Hainaut, O.R.; Detal, A. (1995) Astron. Astrophys. Suppl. Ser. 112, 125-142.]
[De Angelis, G.; Mottola, S. (1995) Planet. Space Sci. 43, 1013-1017.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Torppa, J.; Kaasalainen, M.; Michalowski, T.; Kwiatkowski, T.; et al. (2003) Icarus 164, 346-383.]
[Hanus, J.; Durech, J.; Broz, M.; Warner, B.D.; et al. (2011) Astron. Astrophys. 530, A134.]
[Hanus, J.; Marchis, F.; Durech, J. (2013) Icarus 226, 1045-1057.]
geometric albedo albedo 0.1402   0.010 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3
B-V BV .674 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=6.83, mean=7.96, max.=9.99) deg.
U-B UB .230 mag .045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=6.83, mean=7.96, max.=9.99) deg.
Tholen spectral type spec_T M   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo
SMASSII spectral type spec_B X   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)

69 Hesperia          Discovered 1861-Apr-26 by Schiaparelli, G. at Milan
Apr. 29 is date of first measurement.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1932 CM1 = 1945 NB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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