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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05770477383576524 6.1821e-08  
a 3.010463016534866 2.7064e-08 AU
q 2.836744929024785 1.9515e-07 AU
i 11.03524023226882 7.1797e-06 deg
node 104.3873681943874 3.7078e-05 deg
peri 33.02044848104086 7.3742e-05 deg
M 9.666699518564313 6.2926e-05 deg
tp 2456949.270031406171
(2014-Oct-18.77003141)
0.00033346 JED
period 1907.868208622834
5.22
2.5727e-05
7.044e-08
d
yr
n .1886922788340085 2.5445e-09 deg/d
Q 3.184181104044946 2.8626e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1031  
   data-arc span      30655 days (83.93 yr)  
   first obs. used      1931-01-11  
   last obs. used      2014-12-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51946  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-07 23:57:37  

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 10.8 mag n/a MPO250225  
diameter diameter 19.15 km 1.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 2
rotation period rot_per 8.80 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2004) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
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) (688)
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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