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518 Halawe (A915 TP)
Classification: Main-belt Asteroid          SPK-ID: 2000518
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2283648753000636 3.3427e-08  
a 2.53238673133995 7.8384e-09 au
q 1.954078551225967 8.5021e-08 au
i 6.726706360225907 4.7191e-06 deg
node 203.9228407716042 2.6566e-05 deg
peri 117.3001283948187 2.9036e-05 deg
M 3.942011665173542 1.3337e-05 deg
tp 2458984.382084477629
(2020-May-14.88208448)
5.4504e-05 TDB
period 1471.95139966641
4.03
6.8341e-06
1.871e-08
d
yr
n .2445732923529862 1.1355e-09 deg/d
Q 3.110694911453933 9.6284e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2972  
   data-arc span      42602 days (116.64 yr)  
   first obs. used      1903-10-20  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4717  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:15:22  

Additional Information
 Earth MOID = .952925 au 
 Jupiter MOID = 2.27139 au 
 T_jup = 3.404 
[ 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 11.0   n/a MPO399996  
diameter diameter 16.157 km 0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 14.310 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2012) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Ditteon, R.; Horn, L.; Kamperman, A.; Vorjohan, B.; Kirkpatrick, E. (2012) Minor Planet Bull. 39, 26-28.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.246   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

518 Halawe (A915 TP)          Discovered 1903-Oct-20 by Dugan, R. S. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A915 TP = 1930 FS = A903 UH = A907 VH 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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