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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 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0992437856400185 4.1007e-08  
a 3.010127480576668 1.1812e-08 au
q 2.711391034145189 1.2461e-07 au
i 9.832820715414343 5.1691e-06 deg
node 9.942758999644949 2.1022e-05 deg
peri 39.92418199298469 3.0952e-05 deg
M 13.76611062788193 2.1686e-05 deg
tp 2458927.556849960524
(2020-Mar-19.05684996)
0.00011491 TDB
period 1907.549250768421
5.22
1.1228e-05
3.074e-08
d
yr
n .1887238297281082 1.1108e-09 deg/d
Q 3.308863927008149 1.2984e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2573  
   data-arc span      31728 days (86.87 yr)  
   first obs. used      1933-03-25  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45467  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 15:58:14  

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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