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2117 Danmark (1978 AC)
Classification: Main-belt Asteroid          SPK-ID: 2002117
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06718802167347442 3.277e-08  
a 2.871476856271028 1.2874e-08 au
q 2.67854800701701 9.4041e-08 au
i 2.931988824121274 3.7279e-06 deg
node 59.49412606781279 7.1665e-05 deg
peri 264.8903282412516 7.7131e-05 deg
M 141.4024368266035 2.8848e-05 deg
tp 2458302.410990992285
(2018-Jul-02.91099099)
0.00014264 TDB
period 1777.282265304607
4.87
1.1952e-05
3.272e-08
d
yr
n .2025564577038639 1.3622e-09 deg/d
Q 3.064405705525046 1.3739e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2934  
   data-arc span      30663 days (83.95 yr)  
   first obs. used      1936-11-09  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42958  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:12:27  

Additional Information
 Earth MOID = 1.66835 au 
 Jupiter MOID = 2.14975 au 
 T_jup = 3.293 
[ 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 11.8   n/a MPO319109  
diameter diameter 11.977 km 0.248 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 16.598 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Yankov, A.; Ditteon, R. (2009) Minor Planet Bull. 36, 3-4.]
geometric albedo albedo 0.196   0.037 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

2117 Danmark (1978 AC)          Discovered 1978-Jan-09 by West, R. M. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1978 AC = 1936 VJ = 1949 KY = 1951 YJ1 = 1969 OE1 = 1975 VW8 = 1977 EG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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