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2253 Espinette (1932 PB)
Classification: Mars-crossing Asteroid          SPK-ID: 2002253
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2781018028634979 8.0012e-09  
a 2.283994547097184 4.286e-09 au
q 1.648811545819058 1.7832e-08 au
i 3.88016454270686 3.6407e-07 deg
node 143.9141867232743 4.9489e-06 deg
peri 175.8175546619539 6.5022e-06 deg
M 210.9465927500259 2.7539e-06 deg
tp 2459722.511929862772
1.056e-05 TDB
period 1260.784964381487
n .2855364000764461 8.0372e-10 deg/d
Q 2.919177548375309 5.4779e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2893  
   data-arc span      32379 days (88.65 yr)  
   first obs. used      1932-07-30  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46094  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:06:18  

Additional Information
 Earth MOID = .633952 au 
 Jupiter MOID = 2.40897 au 
 T_jup = 3.548 
[ 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 12.84   n/a MPCxxxxx  
diameter diameter 5.469 km 0.781 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 7.4409 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Wisniewski, W.Z.; Michalowski, T.M.; Harris, A.W.; McMillan, R.S. (1997) Icarus 126, 395-449; 1995, Lunar & Planetary Sci. XXVI, 1511-1512.]
[Behrend, R. (2005) Observatoire de Geneve web site,]
[Stephens, R.D. (2016) Minor Planet Bull. 43, 52-56.]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.J.; Pravec, P.; Koehn, B.W. (2019) Minor Plantet Bull. 46, 238-265.]
geometric albedo albedo 0.404   0.129 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
SMASSII spectral type spec_B Sl   n/a Xu et al. (1995) Icarus 115, 1-35  

2253 Espinette           Discovered 1932 July 30 by G. Van Biesbroeck at the Yerkes Observatory.
Named for the discoverer's residence in Williams Bay, Wisconsin. For many of the 45 years the discoverer worked at the Yerkes Observatory the Van Biesbroecks fed and housed students and visiting astronomers from all over the world. The name originally comes from a small cafe in one of the parks in Brussels. Name proposed by the discoverer's children, Edwin Van Biesbroeck, Simone Van Biesbroeck Titus and Micheline Van Biesbroeck Wilson.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 6059Last Updated: 2006-03-21

Alternate Designations
 1932 PB = 1939 RJ = 1953 VB1 = 1970 PM = 1977 TG 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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