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1479 Inkeri (1938 DE)
Classification: Main-belt Asteroid          SPK-ID: 2001479
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1940811665335726 2.6259e-08  
a 2.67457818973725 8.1647e-09 au
q 2.155492934687794 7.1383e-08 au
i 7.296174515238707 4.6613e-06 deg
node 18.03276837890078 2.4037e-05 deg
peri 80.0118836168958 2.7411e-05 deg
M 316.3268450400035 1.3825e-05 deg
tp 2459194.317702355307
(2020-Dec-10.81770236)
6.1838e-05 TDB
period 1597.649011430983
4.37
7.3157e-06
2.003e-08
d
yr
n .2253310942667908 1.0318e-09 deg/d
Q 3.193663444786707 9.7493e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2454  
   data-arc span      35197 days (96.36 yr)  
   first obs. used      1923-09-13  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44572  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:56:01  

Additional Information
 Earth MOID = 1.18641 au 
 Jupiter MOID = 2.03389 au 
 T_jup = 3.341 
[ 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 11.9   n/a MPO347528  
diameter diameter 15.206 km 0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 660. 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:
[Ferrero, A.; Pilcher, F. (2012) Minor Planet Bull. 39, 192-193.]
geometric albedo albedo 0.222   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
B-V BV 0.699   0.064 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.73, mean=9.31, max.=13.88) deg.
Tholen spectral type spec_T XFU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 1 color indices

1479 Inkeri (1938 DE)          Discovered 1938-Feb-16 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 DE = 1934 FR = 1956 JD = A916 AC = A923 RG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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