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3401 Vanphilos (1981 PA)
Classification: Mars-crossing Asteroid          SPK-ID: 2003401
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3595485709267108 3.8915e-08  
a 2.367746379944785 7.8443e-09 au
q 1.516426552718745 9.1172e-08 au
i 21.79547119436191 6.9592e-06 deg
node 322.3560941738619 1.3772e-05 deg
peri 108.6270202446476 1.8014e-05 deg
M 174.9406172619184 9.9505e-06 deg
tp 2458353.820114723483
(2018-Aug-23.32011472)
3.5191e-05 TDB
period 1330.764475073245
3.64
6.6132e-06
1.811e-08
d
yr
n .2705211979604323 1.3443e-09 deg/d
Q 3.219066207170826 1.0665e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1240  
   data-arc span      27009 days (73.95 yr)  
   first obs. used      1946-02-19  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .36644  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:46:07  

Additional Information
 Earth MOID = .662947 au 
 Jupiter MOID = 2.39874 au 
 T_jup = 3.367 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.4   n/a MPO452211  
diameter diameter 7.023 km 1.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)  
rotation period rot_per 4.2261 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Brinsfield, J. (2008) Minor Planet Bull. 35, 119-122.]
[Pravec, P.; Wolf, M.; Sarounova, L. (2008) http://www.asu.cas.cz/~ppravec/neo.htm]
[Stephens, R.D. (2008) Minor Planet Bull. 35, 126-127.]
[Warner, B.D. (2015) Minor Planet Bull. 42, 54-60.]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.307   0.146 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
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)

3401 Vanphilos (1981 PA)          Discovered 1981-Aug-01 by Harvard College at Agassiz Station
Discovered at Oak Ridge Observatory (until 1981 Harvard College's Agassiz Station). The principal observers are R. E. McCrosky, C.-Y. Shao, G. Schwartz, and J. H. Bulger, with some assistance from others.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 PA = 1946 DA 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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