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4845 Tsubetsu (1991 EC1)
Classification: Main-belt Asteroid          SPK-ID: 2004845
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06691541522819698 3.397e-08  
a 2.400925655580057 9.9196e-09 au
q 2.240266718404886 8.0761e-08 au
i 7.580113556411412 4.4005e-06 deg
node 28.20316162563054 2.7744e-05 deg
peri 223.0956860392506 4.6244e-05 deg
M 125.736250206235 3.8743e-05 deg
tp 2458125.903535033737
(2018-Jan-07.40353503)
0.00014615 TDB
period 1358.834282934439
3.72
8.4212e-06
2.306e-08
d
yr
n .2649329682958619 1.6419e-09 deg/d
Q 2.561584592755227 1.0583e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2846  
   data-arc span      16499 days (45.17 yr)  
   first obs. used      1974-09-26  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .3946  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 21:08:31  

Additional Information
 Earth MOID = 1.23331 au 
 Jupiter MOID = 2.44871 au 
 T_jup = 3.511 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.1   n/a MPO350840  
diameter diameter 7.838 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.182   0.027 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
SMASSII spectral type spec_B X   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)

4845 Tsubetsu (1991 EC1)          Discovered 1991-Mar-05 by Endate and Watanabe at Kitami
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 EC1 = 1974 SA5 = 1983 AT3 = 1985 SX4 = 1989 WP 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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