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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05770477954142235 5.7023e-08  
a 3.010463003032955 2.1975e-08 AU
q 2.83674489912533 1.7519e-07 AU
i 11.03523807091753 5.8191e-06 deg
node 104.3873843757699 3.4752e-05 deg
peri 33.02041664305124 6.9842e-05 deg
M 9.666720567388317 5.7763e-05 deg
tp 2456949.269920199759
(2014-Oct-18.76992020)
0.00030627 JED
period 1907.868195787666
5.22
2.089e-05
5.719e-08
d
yr
n .1886922801034343 2.0661e-09 deg/d
Q 3.18418110694058 2.3243e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1247  
   data-arc span      30835 days (84.42 yr)  
   first obs. used      1931-01-11  
   last obs. used      2015-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49787  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 11:42:44  

Additional Information
 Earth MOID = 1.8583 AU 
 T_jup = 3.219 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.9 mag n/a MPO337269  
diameter diameter 19.15 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 12.20 h n/a LCDB (Rev. 2015-July); 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., in press.]
geometric albedo albedo 0.2104   0.050 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2

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 | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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