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JPL Small-Body Database Browser
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1480 Aunus (1938 DK)
Classification: Main-belt Asteroid          SPK-ID: 2001480
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088940307679084 2.9031e-08  
a 2.202131539365844 5.2885e-09 au
q 1.962332559763158 6.3667e-08 au
i 4.861754612933536 3.7293e-06 deg
node 63.67433192588287 3.8149e-05 deg
peri 64.7534099772442 4.2566e-05 deg
M 85.23080677210885 1.829e-05 deg
tp 2458717.909595548411
(2019-Aug-22.40959555)
6.0434e-05 TDB
period 1193.612373922327
3.27
4.2998e-06
1.177e-08
d
yr
n .3016054523773113 1.0865e-09 deg/d
Q 2.44193051896853 5.8644e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2372  
   data-arc span      28975 days (79.33 yr)  
   first obs. used      1940-12-28  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44003  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:25:21  

Additional Information
 Earth MOID = .983252 au 
 Jupiter MOID = 2.60043 au 
 T_jup = 3.652 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO374861  
diameter diameter 6.385 km 0.069 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 4.646 h n/a LCDB (Rev. 2019-August); 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:
[Black, S.; Linville, D.; Michalik, D.; Wolf, M.; Ditteon, R. (2016) Minor Planet Bull. 43, 287-289.]
geometric albedo albedo 0.257   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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)

1480 Aunus (1938 DK)          Discovered 1938-Feb-18 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 DK = 1992 WX9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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