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805 Hormuthia (A915 HD)
Classification: Main-belt Asteroid          SPK-ID: 2000805
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1876539580166358 3.7001e-08  
a 3.193917307790982 1.4477e-08 au
q 2.594566083406167 1.2167e-07 au
i 15.72281865154829 4.3877e-06 deg
node 166.4274359912214 1.438e-05 deg
peri 132.0533325256791 1.8209e-05 deg
M 305.616741577421 1.1561e-05 deg
tp 2458915.453655278367
(2020-Mar-06.95365528)
6.7496e-05 TDB
period 2084.893755706581
5.71
1.4175e-05
3.881e-08
d
yr
n .1726706691958 1.174e-09 deg/d
Q 3.793268532175798 1.7193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2790  
   data-arc span      38172 days (104.51 yr)  
   first obs. used      1915-04-17  
   last obs. used      2019-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43513  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 01:57:51  

Additional Information
 Earth MOID = 1.60821 au 
 Jupiter MOID = 1.72055 au 
 T_jup = 3.111 
[ 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 9.8   n/a MPO492759 IRAS observations used: 10
diameter diameter 73.095 km 0.549 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 9.510 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pilcher, F.; Benishek, V. (2009) Minor Planet Bull. 36, 29-30.]
geometric albedo albedo 0.039   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.700   0.020 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=13.05 deg.
U-B UB 0.277   0.034 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A915 HD)          Discovered 1915-Apr-17 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A915 HD = 1928 QG = 1950 FU = 1950 GD = A911 UA = A917 UG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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