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JPL Small-Body Database Browser
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4946 Askalaphus (1988 BW1)
Classification: Jupiter Trojan          SPK-ID: 2004946
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0502799295541231 5.4418e-08  
a 5.31758946201391 9.6774e-08 au
q 5.050221438466103 2.8316e-07 au
i 21.86055707458116 6.0799e-06 deg
node 59.0299021769075 1.5745e-05 deg
peri 205.8504647499259 7.3924e-05 deg
M 52.1020073815566 6.9217e-05 deg
tp 2457952.279756181520
(2017-Jul-17.77975618)
0.00086522 TDB
period 4478.892455442296
12.26
0.00012227
3.348e-07
d
yr
n .08037701364375574 2.1942e-09 deg/d
Q 5.584957485561717 1.0164e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1416  
   data-arc span      25159 days (68.88 yr)  
   first obs. used      1950-12-11  
   last obs. used      2019-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51044  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:41:12  

Additional Information
 Earth MOID = 4.04569 au 
 Jupiter MOID = .304411 au 
 T_jup = 2.853 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.2   n/a MPO384798  
diameter diameter 48.209 km 0.430 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 22.731 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
geometric albedo albedo 0.069   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4946 Askalaphus (1988 BW1)          Discovered 1988-Jan-21 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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