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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088940484101612 2.5921e-08  
a 2.20213153735168 5.0735e-09 au
q 1.962332519117763 5.6091e-08 au
i 4.861755114207681 3.6819e-06 deg
node 63.6743541478867 3.4539e-05 deg
peri 64.75339074667083 3.933e-05 deg
M 85.23080644131993 1.8255e-05 deg
tp 2458717.909597032875
(2019-Aug-22.40959703)
6.0317e-05 TDB
period 1193.612372284734
3.27
4.1249e-06
1.129e-08
d
yr
n .3016054527911032 1.0423e-09 deg/d
Q 2.441930555585596 5.6259e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2637  
   data-arc span      29108 days (79.69 yr)  
   first obs. used      1940-12-28  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:18:35  

Additional Information
 Earth MOID = .983252 au 
 Jupiter MOID = 2.60043 au 
 T_jup = 3.652 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456921.5 (2014-Sep-21.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088169044930374 2.5952e-08  
q 1.962907169405645 5.6181e-08 au
tp 2456330.856309967156
(2013-Feb-07.35630997)
5.9219e-05 TDB
node 63.70131091068436 3.4551e-05 deg
peri 64.9251238411841 3.9334e-05 deg
i 4.860917313092463 3.6807e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2637  
   data-arc span      29108 days (79.69 yr)  
   first obs. used      1940-12-28  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:18:35  

Additional Information
 Jupiter MOID = 2.60043 au 
 T_jup = 3.652 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.734968500841918E-16 -1.453542814085799E-15 -8.787277240824006E-14 2.273451161137547E-15 -2.47763191110562E-14 -6.943654351780693E-16
q -1.453542814085799E-15 3.156275042685335E-15 2.097127721181669E-13 -5.283607533963717E-15 6.245596047040729E-14 1.501951940062351E-15
tp -8.787277240824006E-14 2.097127721181669E-13 3.506857913374925E-9 -7.777215351734786E-12 1.118732977355634E-9 7.826675404555979E-13
node 2.273451161137547E-15 -5.283607533963717E-15 -7.777215351734786E-12 1.193764618072929E-9 -1.191546978856552E-9 -2.009747144828364E-11
peri -2.47763191110562E-14 6.245596047040729E-14 1.118732977355634E-9 -1.191546978856552E-9 1.547152344104747E-9 2.026065745452558E-11
i -6.943654351780693E-16 1.501951940062351E-15 7.826675404555979E-13 -2.009747144828364E-11 2.026065745452558E-11 1.354755675653426E-11

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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