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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 101 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .170501025570422 2.7588e-08  
a 2.976950822080474 7.5085e-09 AU
q 2.469377653843042 8.1789e-08 AU
i 8.585626812462227 3.6715e-06 deg
node 185.0265238555094 2.2872e-05 deg
peri 289.7908466516227 2.5086e-05 deg
M 353.3059674865025 1.1019e-05 deg
tp 2457035.385201356846
(2015-Jan-12.88520136)
5.7457e-05 JED
period 1876.09971465512
5.14
7.0979e-06
1.943e-08
d
yr
n .1918874552284542 7.2597e-10 deg/d
Q 3.484523990317906 8.7887e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      2223  
   data-arc span      56274 days (154.07 yr)  
   first obs. used      1861-04-29  
   last obs. used      2015-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51102  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:27:03  

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 LCDB (Rev. 2015-July); Warner et al., 2009 Published Reference List:
[Di Martino, M.; Zappala, V.; De Sanctis, G.; Cacciatori, S. (1987) Icarus 69, 338-353.]
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Shevchenko, V.G.; Velichko, F.P.; Checha, V.A.; Krugly, Y.N. (2014) Minor Planet Bul. 41, 195-198.]
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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