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805 Hormuthia (1915 WW)
Classification: Main-belt Asteroid          SPK-ID: 2000805
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1870943227818602 3.8096e-08  
a 3.194119052690302 1.7947e-08 AU
q 2.596517511642573 1.2283e-07 AU
i 15.72664409302465 5.7138e-06 deg
node 166.4449561557922 1.7163e-05 deg
peri 132.5361665956593 2.2266e-05 deg
M 28.59930726591995 1.4443e-05 deg
tp 2456834.855092444304
(2014-Jun-26.35509244)
8.3097e-05 JED
period 2085.091298386462
5.71
1.7574e-05
4.811e-08
d
yr
n .1726543102830002 1.4552e-09 deg/d
Q 3.791720593738031 2.1305e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1435  
   data-arc span      36401 days (99.66 yr)  
   first obs. used      1915-04-25  
   last obs. used      2014-12-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53027  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:47:48  

Additional Information
 Earth MOID = 1.61146 AU 
 T_jup = 3.111 
[ 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 9.82 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
diameter diameter 66.94 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
rotation period rot_per 9.510 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Pilcher, F.; Benishek, V. (2009) Minor Planet Bul. 36, 29-30.]
geometric albedo albedo 0.0465   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 10
B-V BV .700 mag .020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=13.05 deg.
U-B UB .277 mag .034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=1; phase=13.05 deg.
Tholen spectral type spec_T CX   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

805 Hormuthia (1915 WW)          Discovered 1915-Apr-17 by Wolf, M. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1915 WW = 1928 QG = 1950 FU = 1950 GD = A911 UA = A917 UG 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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