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305 Gordonia (A891 DA)
Classification: Main-belt Asteroid          SPK-ID: 2000305
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 56 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1956646576297222 3.5926e-08  
a 3.088835808953438 1.1179e-08 au
q 2.484459807920138 1.1287e-07 au
i 4.450026841926219 3.8723e-06 deg
node 207.4762274579485 5.1361e-05 deg
peri 260.7956538290912 5.2161e-05 deg
M 297.5827114419255 1.021e-05 deg
tp 2459344.289857520157
(2021-May-09.78985752)
5.7166e-05 TDB
period 1982.853654274063
5.43
1.0764e-05
2.947e-08
d
yr
n .1815565153908439 9.8563e-10 deg/d
Q 3.693211809986739 1.3366e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3022  
   data-arc span      46907 days (128.42 yr)  
   first obs. used      1892-05-24  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44637  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:31:05  

Additional Information
 Earth MOID = 1.506 au 
 Jupiter MOID = 1.49181 au 
 T_jup = 3.191 
[ 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 8.8   n/a MPO502155 IRAS observations used: 22
diameter diameter 47.739 km 0.194 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.893 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Menke, J.; Cooney, W.; Gross, J.; Terrell, D. (2008) Minor Planet Bull. 35, 155-160.]
[Marciniak, A.; Pilcher, F.; Oszkiewicz, D.; Santana-Ros, T.; et al. (2015) Planet. Space Sci. 118, 256-266.]
geometric albedo albedo 0.238   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.919   0.013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.79, mean=9.68, max.=14.58) deg.
U-B UB 0.507   0.018 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=4.79, mean=9.68, max.=14.58) deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices

305 Gordonia (A891 DA)          Discovered 1891-Feb-16 by Charlois, A. at Nice
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 A891 DA = 1938 SC1 = 1970 SP1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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