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JPL Small-Body Database Browser
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620 Drakonia (A906 UO)
Classification: Main-belt Asteroid          SPK-ID: 2000620
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 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1344394842652702 4.1956e-08  
a 2.435331028702543 8.0213e-09 au
q 2.107926381188563 1.0397e-07 au
i 7.736673717097011 4.7694e-06 deg
node 359.946950033856 2.7956e-05 deg
peri 336.1360492533025 3.1998e-05 deg
M 11.60080646313381 1.6123e-05 deg
tp 2458955.767712154697
(2020-Apr-16.26771215)
6.2141e-05 TDB
period 1388.146908189937
3.80
6.8582e-06
1.878e-08
d
yr
n .2593385454205415 1.2813e-09 deg/d
Q 2.762735676216522 9.0997e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3195  
   data-arc span      32339 days (88.54 yr)  
   first obs. used      1931-03-27  
   last obs. used      2019-10-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:34:45  

Additional Information
 Earth MOID = 1.10154 au 
 Jupiter MOID = 2.61511 au 
 T_jup = 3.480 
[ hide covariance matrix ]
Orbital Elements at Epoch 2455979.5 (2012-Feb-22.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .133515241670131 4.1756e-08  
q 2.110668704439576 1.0336e-07 au
tp 2456178.839754307924
(2012-Sep-08.33975431)
6.304e-05 TDB
node .1419842478817341 2.7971e-05 deg
peri 336.0354198638887 3.2119e-05 deg
i 7.734038891991754 4.7678e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3195  
   data-arc span      32339 days (88.54 yr)  
   first obs. used      1931-03-27  
   last obs. used      2019-10-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3768  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 17:34:45  

Additional Information
 Jupiter MOID = 2.61511 au 
 T_jup = 3.480 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.743600833245242E-15 -4.306711166583813E-15 7.617449058749939E-13 8.181484877068892E-15 1.807369889867795E-13 3.357577837530693E-16
q -4.306711166583813E-15 1.068315170495024E-14 -1.894261537680352E-12 -2.069299422665696E-14 -4.524696338277225E-13 -6.680539701348131E-16
tp 7.617449058749939E-13 -1.894261537680352E-12 3.974034269080946E-9 -3.155436344201242E-12 1.007338542414597E-9 -2.147567156625424E-14
node 8.181484877068892E-15 -2.069299422665696E-14 -3.155436344201242E-12 7.823787019378364E-10 -7.753285605006959E-10 7.601680383234964E-12
peri 1.807369889867795E-13 -4.524696338277225E-13 1.007338542414597E-9 -7.753285605006959E-10 1.031613125012213E-9 -7.585636884362398E-12
i 3.357577837530693E-16 -6.680539701348131E-16 -2.147567156625424E-14 7.601680383234964E-12 -7.585636884362398E-12 2.273213940866991E-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 10.9   n/a MPO492756  
diameter diameter 11.385 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.487 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Warner, B.D. (2002) Minor Planet Bull. 29, 27-28.]
[Bel'skaya, I.N.; Shevchenko, V.G.; Kiselev, N.; Krugly, Yu.N.; et al. (2003) Icarus 166, 276-284.]
[Almeida, R.; Angeli, C.A.; Duffard, R.; Lazzaro, D. (2004) Astron. Astrophys. 415, 403-406.]
[Bin, L.; Haibin, Z.; Jingshen, Y. (2011) Minor Planet Bull. 38, 179-180.]
[Warner, B.D. (2011) Minor Planet Bull. 38, 52-54.]
[Klinglesmith III, D.A.; Hanowell, J.; Risley, E.; Turk, J.; et al. (2014) Minor Planet Bull. 41, 139-143.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.419   0.048 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
B-V BV 0.683   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.51 deg.
U-B UB 0.237   0.035 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=1.51 deg.
Tholen spectral type spec_T E   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo

620 Drakonia (A906 UO)          Discovered 1906-Oct-26 by Metcalf, J. H. at Taunton
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A906 UO = 1950 ET = 1950 HS = 1955 QE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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