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1462 Zamenhof (1938 CA)
Classification: Main-belt Asteroid          SPK-ID: 2001462
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1095769810666923 5.0974e-08  
a 3.146073479697961 2.3152e-08 au
q 2.801336245578675 1.6184e-07 au
i .9677446345127706 5.6855e-06 deg
node 24.76722916032362 0.00025726 deg
peri 188.3979408299921 0.00025877 deg
M 260.4277557639018 2.3428e-05 deg
tp 2457964.251245643909
(2017-Jul-29.75124564)
0.00013492 JED
period 2038.223101114268
5.58
2.2499e-05
6.16e-08
d
yr
n .1766244332149866 1.9497e-09 deg/d
Q 3.490810713817247 2.5689e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1827  
   data-arc span      19060 days (52.18 yr)  
   first obs. used      1963-10-14  
   last obs. used      2015-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50159  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 12:39:01  

Additional Information
 Earth MOID = 1.79465 au 
 Jupiter MOID = 1.47589 au 
 T_jup = 3.199 
[ 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 11.2 mag n/a MPO279529  
diameter diameter 25.82 km 1.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6
rotation period rot_per 10.4 h n/a LCDB (Rev. 2015-December); 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:
[Menke, J.; Cooney, W.; Gross, J.; Terrell, D. (2008) Minor Planet Bul. 35, 155-160.]
[Behrend, R. (2011) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.1268   0.019 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 6

1462 Zamenhof (1938 CA)          Discovered 1938-Feb-06 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1938 CA = 1963 TS = 1964 VF2 = 1969 TU5 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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