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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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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1954844863961647 2.6446e-08  
a 2.268926416717014 5.2795e-09 au
q 1.825386501474398 6.0499e-08 au
i 8.945570464667654 3.3848e-06 deg
node 69.41264379331314 1.9421e-05 deg
peri 222.265668905669 2.1332e-05 deg
M 327.2558353956082 9.1821e-06 deg
tp 2459114.043024427770
(2020-Sep-21.54302443)
3.187e-05 TDB
period 1248.328955337435
3.42
4.3571e-06
1.193e-08
d
yr
n .2883855240726099 1.0066e-09 deg/d
Q 2.71246633195963 6.3116e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3336  
   data-arc span      32697 days (89.52 yr)  
   first obs. used      1931-05-05  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3868  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:01:35  

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 121.6 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Polakis, T. (2020) Minor Planet Bull. 47, 314-321.]
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

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1976-Sep-05 17:35 < 00:01 Hebe 0.0375893547990993 0.0375887361051689 0.0375899735290662 7.68277069549717 7.6827706739706 2443027.232378090 0.176992194843099 103.923066425288 25.0243747961176 79.6979694185065 221260.080134556 T 39 CATAB v2.0f-lin.ifort 2020-Dec-18 02:01:44 2020-Dec-18 02:01

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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