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3449 Abell (1978 VR9)
Classification: Main-belt Asteroid          SPK-ID: 2003449
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1504997283368809 3.2506e-08  
a 3.089850129887087 1.6381e-08 au
q 2.624828524737405 1.0572e-07 au
i 2.038382626465456 3.5673e-06 deg
node 81.39540682477205 0.00011263 deg
peri 334.4700887347561 0.00011368 deg
M 258.0734738835131 1.7454e-05 deg
tp 2459562.180402459971
(2021-Dec-13.68040246)
9.8561e-05 TDB
period 1983.830437373085
5.43
1.5776e-05
4.319e-08
d
yr
n .1814671219969277 1.443e-09 deg/d
Q 3.55487173503677 1.8846e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2101  
   data-arc span      15334 days (41.98 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49295  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:11  

Additional Information
 Earth MOID = 1.63682 au 
 Jupiter MOID = 1.7933 au 
 T_jup = 3.207 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456923.5 (2014-Sep-23.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1560502668644335 3.3284e-08  
q 2.601269517542066 1.0917e-07 au
tp 2457572.810500249971
(2016-Jul-03.31050025)
8.5137e-05 TDB
node 81.42357216906035 0.00011245 deg
peri 333.1776340302325 0.00011339 deg
i 2.044165049208282 3.5644e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2101  
   data-arc span      15334 days (41.98 yr)  
   first obs. used      1978-11-05  
   last obs. used      2020-10-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49295  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:11  

Additional Information
 Jupiter MOID = 1.7933 au 
 T_jup = 3.207 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.107797456036534E-15 -3.610438772308888E-15 -6.734458156407991E-13 2.206090368819955E-15 -9.488482092803864E-14 4.338306080705216E-18
q -3.610438772308888E-15 1.191891592523729E-14 2.624805539894169E-12 -7.778137288382818E-15 3.735404545501486E-13 9.243704979956122E-17
tp -6.734458156407991E-13 2.624805539894169E-12 7.24831287347204E-9 -1.784886278288535E-11 1.26208024872451E-9 5.868605103015615E-13
node 2.206090368819955E-15 -7.778137288382818E-15 -1.784886278288535E-11 1.264542280265308E-8 -1.264017480623993E-8 5.803251651882778E-11
peri -9.488482092803864E-14 3.735404545501486E-13 1.26208024872451E-9 -1.264017480623993E-8 1.285718713497768E-8 -5.789947744547544E-11
i 4.338306080705216E-18 9.243704979956122E-17 5.868605103015615E-13 5.803251651882778E-11 -5.789947744547544E-11 1.270505636454062E-11

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 12.8   n/a MPO267721  
diameter diameter 15.796 km 0.119 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.063   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

3449 Abell (1978 VR9)          Discovered 1978-Nov-07 by Helin, E. F. and Bus, S. J. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1978 VR9 = 1983 TQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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