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1552 Bessel (1938 DE1)
Classification: Main-belt Asteroid          SPK-ID: 2001552
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 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0992437828021122 3.8739e-08  
a 3.010127480910675 1.1398e-08 au
q 2.711391042988506 1.1687e-07 au
i 9.832821963954261 4.7473e-06 deg
node 9.942759355259906 2.0987e-05 deg
peri 39.92418133571775 3.0627e-05 deg
M 13.76611084660911 2.0998e-05 deg
tp 2458927.556848789403
(2020-Mar-19.05684879)
0.00011129 TDB
period 1907.549251085916
5.22
1.0834e-05
2.966e-08
d
yr
n .1887238296966968 1.0719e-09 deg/d
Q 3.308863918832843 1.2529e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2785  
   data-arc span      31997 days (87.60 yr)  
   first obs. used      1933-03-25  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4463  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:17:51  

Additional Information
 Earth MOID = 1.72885 au 
 Jupiter MOID = 2.11225 au 
 T_jup = 3.220 
[ 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 11.4   n/a MPO332830  
diameter diameter 18.514 km 0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 8.996 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2016) Astron. Astrophys., submitted.]
[Hanus, J.; Delbo, M.; Ali-Lagoa, V.; Bolin, B.; et al. (2018) Icarus 299, 84-96.]
geometric albedo albedo 0.156   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1552 Bessel (1938 DE1)          Discovered 1938-Feb-24 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1938 DE1 = 1933 FJ1 = 1948 EH = 1951 UF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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