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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2027117050565163 1.3252e-08  
a 2.80125548678244 8.7266e-09 au
q 2.23340821075785 3.8093e-08 au
i 2.264318069386423 5.2998e-07 deg
node 251.5431671833286 9.9381e-06 deg
peri 234.2983419086289 1.0058e-05 deg
M 223.054987722881 6.8073e-06 deg
tp 2459851.935205863427
(2022-Sep-29.43520586)
3.4405e-05 TDB
period 1712.487882627451
4.69
8.0022e-06
2.191e-08
d
yr
n .2102204655881454 9.8233e-10 deg/d
Q 3.36910276280703 1.0496e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2959  
   data-arc span      35407 days (96.94 yr)  
   first obs. used      1924-01-29  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43928  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:48:58  

Additional Information
 Earth MOID = 1.24963 au 
 Jupiter MOID = 1.7146 au 
 T_jup = 3.293 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457008.5 (2014-Dec-17.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1999392819231589 1.3051e-08  
q 2.242716831159209 3.7428e-08 au
tp 2456416.691026406991
(2013-May-04.19102641)
2.6591e-05 TDB
node 251.7579458821229 9.8812e-06 deg
peri 233.0879075878846 1.0029e-05 deg
i 2.268256145599074 5.303e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2959  
   data-arc span      35407 days (96.94 yr)  
   first obs. used      1924-01-29  
   last obs. used      2021-01-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43928  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:48:58  

Additional Information
 Jupiter MOID = 1.7146 au 
 T_jup = 3.293 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.703411234043817E-16 -4.80234853936341E-16 8.959200974636387E-14 7.254021234384565E-15 2.049928925223812E-15 8.082029854628717E-16
q -4.80234853936341E-16 1.400885110021223E-15 -1.948415096333142E-13 -1.46256985674132E-14 8.156395053546956E-16 -1.945960886455405E-15
tp 8.959200974636387E-14 -1.948415096333142E-13 7.070731238711411E-10 5.153373225424694E-11 6.144951802413577E-11 2.403148256992065E-12
node 7.254021234384565E-15 -1.46256985674132E-14 5.153373225424694E-11 9.76386486372889E-11 -8.969677825227635E-11 4.298348275269169E-12
peri 2.049928925223812E-15 8.156395053546956E-16 6.144951802413577E-11 -8.969677825227635E-11 1.005875325760733E-10 -3.961429556863694E-12
i 8.082029854628717E-16 -1.945960886455405E-15 2.403148256992065E-12 4.298348275269169E-12 -3.961429556863694E-12 2.81221524478108E-13

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 11.93   n/a E2021B10  
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. 2020-October); 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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