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JPL Small-Body Database Browser
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7660 Alexanderwilson (1993 VM1)
Classification: Mars-crossing Asteroid          SPK-ID: 2007660
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1400646064319381 3.1562e-08  
a 1.910078361205974 4.4459e-09 au
q 1.642543987289498 6.0139e-08 au
i 23.1476729923017 4.6304e-06 deg
node 170.4799103654691 8.9025e-06 deg
peri 265.2037798044558 1.9523e-05 deg
M 5.429434119209197 1.7782e-05 deg
tp 2458985.957895178796
(2020-May-16.45789518)
4.7612e-05 TDB
period 964.2179314989098
2.64
3.3665e-06
9.217e-09
d
yr
n .3733595779953684 1.3035e-09 deg/d
Q 2.17761273512245 5.0686e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1751  
   data-arc span      10755 days (29.45 yr)  
   first obs. used      1990-08-16  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4436  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:35:12  

Additional Information
 Earth MOID = .780664 au 
 Jupiter MOID = 3.09914 au 
 T_jup = 3.827 
[ 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 14.5   n/a MPO502225  
diameter diameter 3.155 km 0.496 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 5.924 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2005) http://www.asu.cas.cz/~ppravec/neo.htm]
[Warner, B.D (2012) Minor Planet Bull. 39, 16-21.]
[Stephens, R.D.; Coley, D.; Warner, B.D. (2014) Minor Planet Bull. 41, 8-13.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 54-60.]
[Hanus, J.; Durech, J.; Oszkiewicz, D.A.; Behrend, R.; et al. (2016) Astron. Astrophys. 586, A108.]
[Warner, B.D. (2016) Minor Planet Bull. 43, 300-304.]
geometric albedo albedo 0.348   0.110 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  

7660 Alexanderwilson           Discovered 1993 Nov. 5 by R. H. McNaught at Siding Spring.
Alexander Wilson (1714-1786) was the first professor of practical astronomy at the University of Glasgow. He measured atmospheric temperature with height and, from the "Wilson Effect", developed a model of sunspots.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2016-11-14Last Updated: 2016-11-20

Alternate Designations
 1993 VM1 = 1990 QC 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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