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1795 Woltjer (4010 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2001795
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1899593300744263 5.0418e-08  
a 2.786311122394919 2.04e-08 AU
q 2.257025328205858 1.4497e-07 AU
i 7.526002635579558 5.6972e-06 deg
node 192.1665382739262 4.3557e-05 deg
peri 79.75378227768827 4.6061e-05 deg
M 266.3017466372388 1.7566e-05 deg
tp 2457242.652244733682
(2015-Aug-08.15224473)
8.4994e-05 JED
period 1698.802297710567
4.65
1.8657e-05
5.108e-08
d
yr
n .2119140058176063 2.3273e-09 deg/d
Q 3.31559691658398 2.4275e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1265  
   data-arc span      21466 days (58.77 yr)  
   first obs. used      1955-08-23  
   last obs. used      2014-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49545  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 13:19:16  

Additional Information
 Earth MOID = 1.25575 AU 
 T_jup = 3.292 
[ 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 12.0 mag n/a MPO259348  
diameter diameter 27.09 km 1.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
geometric albedo albedo 0.0459   0.004 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
SMASSII spectral type spec_B Ch   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

1795 Woltjer (4010 P-L)          Discovered 1960-Sep-24 by PLS at Palomar (675)
These planets have all been discovered as a result of the Palomar survey of faint minor planets and subsequently identified with planets observed at other oppositions. In Sept. and Oct. 1960, T. Gehrels exposed 130 plates with the 122 cm Schmidt camera at Palomar. In the following years C. J. van Houten and I. van Houten-Groeneveld measured these plates astrometrically and photometrically at Leiden. P. Herget, Cincinnati, computed the orbits of the planets found on the NORC computer, Dahlgren, Virginia, USA.
Note: "planet" implies "minor planet"
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 4010 P-L = 1950 LE1 = 1955 QM = 1959 JA = 1968 DZ = 1969 PK 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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