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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 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088940155209598 3.7727e-08  
a 2.202131541073226 5.9736e-09 au
q 1.962332594860402 8.4483e-08 au
i 4.861752243521056 3.8869e-06 deg
node 63.67429618587853 4.1335e-05 deg
peri 64.75344327461214 4.5375e-05 deg
M 85.23080687719408 1.8335e-05 deg
tp 2458717.909594871340
(2019-Aug-22.40959487)
6.0549e-05 TDB
period 1193.612375310496
3.27
4.8568e-06
1.33e-08
d
yr
n .3016054520265449 1.2272e-09 deg/d
Q 2.441930487286049 6.6241e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2207  
   data-arc span      28890 days (79.10 yr)  
   first obs. used      1940-12-28  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45263  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:56:01  

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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