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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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456871.5 (2014-Aug-02.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1960206664494452 2.6506e-08  
q 1.823814204671665 6.0656e-08 au
tp 2456616.736207670492
(2013-Nov-20.23620767)
3.2056e-05 TDB
node 69.48863411645726 1.942e-05 deg
peri 222.0597293864637 2.1308e-05 deg
i 8.947008687345594 3.3849e-06 deg
  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
 Jupiter MOID = 2.47666 au 
 T_jup = 3.573 
Orbit Covariance (6×6)
  e q tp node peri i
e 7.025554658708457E-16 -1.603776319260476E-15 -1.298872015981894E-13 -3.32150960635269E-15 -2.782647228618469E-14 5.037354551155766E-17
q -1.603776319260476E-15 3.679121161424699E-15 2.700296535112486E-13 7.280724883813969E-15 5.738703647575079E-14 -3.031788386859983E-17
tp -1.298872015981894E-13 2.700296535112486E-13 1.027566899542323E-9 1.933677579894103E-12 2.889950078639973E-10 2.400757741780867E-13
node -3.32150960635269E-15 7.280724883813969E-15 1.933677579894103E-12 3.771260407391069E-10 -3.715775844440562E-10 -8.010925783774288E-12
peri -2.782647228618469E-14 5.738703647575079E-14 2.889950078639973E-10 -3.715775844440562E-10 4.540170810995415E-10 7.964488331958022E-12
i 5.037354551155766E-17 -3.031788386859983E-17 2.400757741780867E-13 -8.010925783774288E-12 7.964488331958022E-12 1.145781413038031E-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 11.9   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

[ 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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