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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2282034750049196 3.2922e-08  
a 2.531973633772483 6.1586e-09 au
q 1.954168451924769 8.3291e-08 au
i 6.72699317614011 4.5606e-06 deg
node 203.9208763191269 2.3146e-05 deg
peri 117.3080386002841 2.5591e-05 deg
M 52.86848467349572 1.0939e-05 deg
tp 2458984.386669009719
(2020-May-14.88666901)
4.4691e-05 TDB
period 1471.591244518963
4.03
5.3691e-06
1.47e-08
d
yr
n .2446331488725849 8.9255e-10 deg/d
Q 3.109778815620197 7.5641e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3756  
   data-arc span      42876 days (117.39 yr)  
   first obs. used      1903-10-20  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42978  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:00:35  

Additional Information
 Earth MOID = .951102 au 
 Jupiter MOID = 2.27219 au 
 T_jup = 3.404 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456548.5 (2013-Sep-13.0) TDB
Reference: JPL 43 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2262236138394077 3.2855e-08  
q 1.961978751881901 8.3211e-08 au
tp 2456039.982115319165
(2012-Apr-22.48211532)
4.6837e-05 TDB
node 204.1153590038358 2.3148e-05 deg
peri 117.3143921564651 2.5663e-05 deg
i 6.722158841161471 4.5575e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3756  
   data-arc span      42876 days (117.39 yr)  
   first obs. used      1903-10-20  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42978  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:00:35  

Additional Information
 Jupiter MOID = 2.27219 au 
 T_jup = 3.404 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.079474308804191E-15 -2.729163949942943E-15 9.339810078741552E-13 -4.49900151685264E-15 2.133455720456241E-13 8.060334239777822E-17
q -2.729163949942943E-15 6.924029371338594E-15 -2.425527948024273E-12 1.154907489609411E-14 -5.531884079424132E-13 -4.348855876577859E-16
tp 9.339810078741552E-13 -2.425527948024273E-12 2.193660563332509E-9 -9.569495706578729E-12 5.239753512758019E-10 -2.413092183936878E-12
node -4.49900151685264E-15 1.154907489609411E-14 -9.569495706578729E-12 5.358284075249939E-10 -5.339144947337883E-10 -8.511112393693096E-12
peri 2.133455720456241E-13 -5.531884079424132E-13 5.239753512758019E-10 -5.339144947337883E-10 6.585894318160128E-10 7.930363684559674E-12
i 8.060334239777822E-17 -4.348855876577859E-16 -2.413092183936878E-12 -8.511112393693096E-12 7.930363684559674E-12 2.077115966215379E-11

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 11.06   n/a E2021B10  
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. 2020-October); 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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