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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0671880215188377 3.2776e-08  
a 2.871476856985373 1.2931e-08 au
q 2.678548008127395 9.4061e-08 au
i 2.931988950123206 3.7457e-06 deg
node 59.49412542781231 7.1712e-05 deg
peri 264.8903271843574 7.723e-05 deg
M 141.4024382502652 2.8955e-05 deg
tp 2458302.410983703318
(2018-Jul-02.91098370)
0.00014321 TDB
period 1777.282265967816
4.87
1.2006e-05
3.287e-08
d
yr
n .2025564576282781 1.3683e-09 deg/d
Q 3.06440570584335 1.38e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2873  
   data-arc span      30480 days (83.45 yr)  
   first obs. used      1936-11-09  
   last obs. used      2020-04-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43009  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:35:09  

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

[ show close-approach data ]
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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