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1014 Semphyra (A924 BM)
Classification: Main-belt Asteroid          SPK-ID: 2001014
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2015321925230455 3.5335e-08  
a 2.804407978752264 9.4918e-09 au
q 2.239229490065197 9.9137e-08 au
i 2.265694944945066 3.4814e-06 deg
node 251.6321118389105 9.295e-05 deg
peri 234.0264465114589 9.3222e-05 deg
M 181.2650758006326 8.8782e-06 deg
tp 2459852.161740334236
(2022-Sep-29.66174033)
4.4454e-05 TDB
period 1715.379509033916
4.70
8.7088e-06
2.384e-08
d
yr
n .2098660955806499 1.0655e-09 deg/d
Q 3.36958646743933 1.1405e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2596  
   data-arc span      35254 days (96.52 yr)  
   first obs. used      1924-01-29  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 22:26:38  

Additional Information
 Earth MOID = 1.25554 au 
 Jupiter MOID = 1.71497 au 
 T_jup = 3.292 
[ 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 11.9   n/a MPO448921  
diameter diameter 17.487 km 0.250 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.636 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pray, D. (2005) Minor Planet Bull. 32, 8-9.]
geometric albedo albedo 0.083   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B Xe   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)

1014 Semphyra (A924 BM)          Discovered 1924-Jan-29 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A924 BM = 1932 WH = 1984 YP6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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