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4001 Ptolemaeus (1949 PV)
Classification: Main-belt Asteroid          SPK-ID: 2004001
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .173029086217063 6.6697e-08  
a 2.28653009723821 8.2619e-09 au
q 1.890893883905271 1.5054e-07 au
i 5.459247225369634 4.5703e-06 deg
node 130.7240450099503 6.8585e-05 deg
peri 203.9673068206733 7.0828e-05 deg
M 123.6784513696145 1.9817e-05 deg
tp 2457166.634269436011
(2015-May-24.13426944)
6.8676e-05 JED
period 1262.885015727238
3.46
6.8447e-06
1.874e-08
d
yr
n .2850615816299732 1.545e-09 deg/d
Q 2.68216631057115 9.6914e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1310  
   data-arc span      24326 days (66.60 yr)  
   first obs. used      1949-08-20  
   last obs. used      2016-03-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50154  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:46:26  

Additional Information
 Earth MOID = .881416 au 
 Jupiter MOID = 2.66714 au 
 T_jup = 3.576 
[ 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 13.7 mag n/a MPO365295  
SMASSII spectral type spec_B S   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)

4001 Ptolemaeus (1949 PV)          Discovered 1949-Aug-02 by Reinmuth, K. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1949 PV = 1949 QD1 = 1982 BU9 = 1987 OE 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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