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1857 Parchomenko (1971 QS1)
Classification: Main-belt Asteroid          SPK-ID: 2001857
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .135129679222753 3.3803e-08  
a 2.24312693271672 5.0844e-09 au
q 1.940013909842792 7.5959e-08 au
i 4.400941624888018 3.604e-06 deg
node 236.0511904311179 4.2858e-05 deg
peri 173.9445154378426 4.4581e-05 deg
M 132.4483607156675 1.2009e-05 deg
tp 2458549.035830271437
(2019-Mar-06.53583027)
4.0655e-05 TDB
period 1227.097868362346
3.36
4.1721e-06
1.142e-08
d
yr
n .293375132727145 9.9746e-10 deg/d
Q 2.546239955590648 5.7714e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2572  
   data-arc span      32202 days (88.16 yr)  
   first obs. used      1931-12-05  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44651  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:06:40  

Additional Information
 Earth MOID = .950528 au 
 Jupiter MOID = 2.7939 au 
 T_jup = 3.617 
[ 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 12.3   n/a MPO416726  
diameter diameter 7.986 km 0.201 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 3.1177 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Warner, B.D. (2006) Minor Planet Bull. 33, 52.]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
geometric albedo albedo 0.333   0.053 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
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)

1857 Parchomenko (1971 QS1)          Discovered 1971-Aug-30 by Smirnova, T. at Nauchnyj
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 1971 QS1 = 1931 XT = 1941 WJ = 1974 OE1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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