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1594 Danjon (1949 WA)
Classification: Main-belt Asteroid          SPK-ID: 2001594
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 .1954844874882167 2.6603e-08  
a 2.268926417080879 5.3669e-09 au
q 1.825386499289348 6.0786e-08 au
i 8.945570816114131 3.4126e-06 deg
node 69.41263992427304 2.0049e-05 deg
peri 222.2656734655293 2.1937e-05 deg
M 327.2558343310286 9.5934e-06 deg
tp 2459114.043028146599
(2020-Sep-21.54302815)
3.3316e-05 TDB
period 1248.328955637725
3.42
4.4292e-06
1.213e-08
d
yr
n .2883855240032377 1.0232e-09 deg/d
Q 2.712466334872411 6.4161e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3151  
   data-arc span      32551 days (89.12 yr)  
   first obs. used      1931-05-05  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .39684  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:33:30  

Additional Information
 Earth MOID = .820234 au 
 Jupiter MOID = 2.47666 au 
 T_jup = 3.573 
[ 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 MPO319102  
diameter diameter 10.545 km 0.181 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12. h n/a LCDB (Rev. 2019-August); Warner et al., 2009 lower-limit; Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.262   0.031 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   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)

1594 Danjon (1949 WA)          Discovered 1949-Nov-23 by Boyer, L. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 WA = 1931 JA = 1935 SF1 = 1937 AB = 1938 KC = 1941 FG = 1951 CY1 = A924 GB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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