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JPL Small-Body Database Browser
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2531 Cambridge (1980 LD)
Classification: Main-belt Asteroid          SPK-ID: 2002531
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05583667923254134 3.854e-08  
a 3.008454054396962 1.5021e-08 au
q 2.84047197037576 1.1987e-07 au
i 11.03294417664744 4.2395e-06 deg
node 104.3448353121665 2.1854e-05 deg
peri 32.05575276098836 4.4004e-05 deg
M 28.36661975656926 3.7992e-05 deg
tp 2458850.317756358575
(2020-Jan-01.81775636)
0.00020105 TDB
period 1905.958770374547
5.22
1.4275e-05
3.908e-08
d
yr
n .1888813155854652 1.4146e-09 deg/d
Q 3.176436138418163 1.586e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2459  
   data-arc span      32532 days (89.07 yr)  
   first obs. used      1931-01-11  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41657  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:24:32  

Additional Information
 Earth MOID = 1.86152 au 
 Jupiter MOID = 1.9064 au 
 T_jup = 3.220 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.0   n/a MPO502177  
diameter diameter 22.349 km 0.196 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 12.20 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.166   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2531 Cambridge (1980 LD)          Discovered 1980-Jun-11 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1980 LD = 1931 AP = 1942 EQ = 1952 BG = 1963 FK = 1963 HD = 1971 VY = 1974 KH = A916 FE 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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