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1809 Prometheus (2522 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2001809
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1006149546952029 3.6034e-08  
a 2.926600084249901 1.26e-08 au
q 2.632140349362121 1.0901e-07 au
i 3.259621038555538 3.701e-06 deg
node 99.45412462671857 7.2067e-05 deg
peri 230.5013426719687 7.4991e-05 deg
M 1.1469458659554 2.0842e-05 deg
tp 2458994.673819737394
(2020-May-25.17381974)
0.00010586 TDB
period 1828.704350218738
5.01
1.181e-05
3.233e-08
d
yr
n .1968606898960671 1.2713e-09 deg/d
Q 3.221059819137682 1.3868e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2480  
   data-arc span      23596 days (64.60 yr)  
   first obs. used      1955-09-18  
   last obs. used      2020-04-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47128  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 01:30:44  

Additional Information
 Earth MOID = 1.62251 au 
 Jupiter MOID = 2.08251 au 
 T_jup = 3.268 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.7   n/a MPO492771  
diameter diameter 14.212 km 0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 22.447 h n/a LCDB (Rev. 2019-August); 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:
[Behrend, R. (2018) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Durech, J.; Hanus, J.; Ali-Lagoa, V. (2018) Astron. Astrophys. 617, A57.]
geometric albedo albedo 0.126   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

1809 Prometheus (2522 P-L)          Discovered 1960-Sep-24 by PLS at Palomar
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
 2522 P-L = 1943 EA1 = 1955 SW = 1955 VA = 1965 UR 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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