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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 ]

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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1086753762133274 1.4067e-08  
a 2.202860783493386 4.6831e-09 au
q 1.963464059101657 3.1161e-08 au
i 4.860659578773678 7.1629e-07 deg
node 63.6696474883631 6.9615e-06 deg
peri 64.91308992195037 8.2375e-06 deg
M 145.3840187123382 5.3652e-06 deg
tp 2458718.226751158838
(2019-Aug-22.72675116)
1.7625e-05 TDB
period 1194.205326834071
3.27
3.8082e-06
1.043e-08
d
yr
n .3014556977018243 9.613e-10 deg/d
Q 2.442257507885115 5.192e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2667  
   data-arc span      29108 days (79.69 yr)  
   first obs. used      1940-12-28  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42264  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:31:09  

Additional Information
 Earth MOID = .984289 au 
 Jupiter MOID = 2.59891 au 
 T_jup = 3.651 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456948.5 (2014-Oct-18.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1088177346569018 1.4095e-08  
q 1.962903080297127 3.1279e-08 au
tp 2457524.861941902475
(2016-May-16.36194190)
1.7726e-05 TDB
node 63.70060636646091 6.9624e-06 deg
peri 64.93192209177181 8.2316e-06 deg
i 4.860893180053012 7.162e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2667  
   data-arc span      29108 days (79.69 yr)  
   first obs. used      1940-12-28  
   last obs. used      2020-09-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42264  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:31:09  

Additional Information
 Jupiter MOID = 2.59891 au 
 T_jup = 3.651 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.986556208265402E-16 -4.368348359190996E-16 -1.423829487222898E-13 -4.167848306284202E-15 -2.727448645376907E-14 -2.14328244957788E-15
q -4.368348359190996E-16 9.784019279650449E-16 3.028688444390944E-13 9.146610764414449E-15 5.554753782189021E-14 4.680910177864449E-15
tp -1.423829487222898E-13 3.028688444390944E-13 3.142260650296249E-10 1.241899131460511E-11 7.919099438057213E-11 1.85393214525811E-12
node -4.167848306284202E-15 9.146610764414449E-15 1.241899131460511E-11 4.84743341695288E-11 -4.415138594935936E-11 4.812530870388985E-13
peri -2.727448645376907E-14 5.554753782189021E-14 7.919099438057213E-11 -4.415138594935936E-11 6.775920006314772E-11 -7.066255854422893E-14
i -2.14328244957788E-15 4.680910177864449E-15 1.85393214525811E-12 4.812530870388985E-13 -7.066255854422893E-14 5.129464753929192E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.20   n/a E2021B10  
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 5.1600 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Benishek, V.; Pravec, P.; Oey, J.; Durkee, R.; et al. (2020). CBET 4789.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2020) http://www.asu.cas.cz/~ppravec/neo.htm]
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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