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1601 Patry (1942 KA)
Classification: Main-belt Asteroid          SPK-ID: 2001601
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .129310489786781 1.0678e-08  
a 2.234132411280511 4.5408e-09 au
q 1.945235654929306 2.3742e-08 au
i 4.939388190973424 3.7129e-07 deg
node 74.66740201048864 4.424e-06 deg
peri 196.5643761969682 7.4005e-06 deg
M 164.5919686269884 6.1768e-06 deg
tp 2458642.842009557702
(2019-Jun-08.34200956)
2.0606e-05 TDB
period 1219.724621036636
3.34
3.7186e-06
1.018e-08
d
yr
n .2951485882887551 8.9983e-10 deg/d
Q 2.523029167631716 5.128e-09 au
  Orbit Determination Parameters
   # obs. used (total)      3003  
   data-arc span      28790 days (78.82 yr)  
   first obs. used      1942-05-18  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43002  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:40:45  

Additional Information
 Earth MOID = .927877 au 
 Jupiter MOID = 2.55561 au 
 T_jup = 3.624 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456643.5 (2013-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299486223651656 1.0661e-08  
q 1.943405355141934 2.3705e-08 au
tp 2456202.660527433757
(2012-Oct-02.16052743)
2.0692e-05 TDB
node 74.72176608643586 4.4179e-06 deg
peri 196.2962957397741 7.358e-06 deg
i 4.943023694555123 3.7169e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      3003  
   data-arc span      28790 days (78.82 yr)  
   first obs. used      1942-05-18  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43002  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:40:45  

Additional Information
 Jupiter MOID = 2.55561 au 
 T_jup = 3.624 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.13656854611933E-16 -2.492090660315978E-16 9.305254532768835E-14 -1.150357202112823E-14 4.780208611895396E-14 2.35247743840505E-16
q -2.492090660315978E-16 5.619410606767702E-16 -2.250206580391812E-13 2.601335352282917E-14 -1.084779556377438E-13 -5.801364617859607E-16
tp 9.305254532768835E-14 -2.250206580391812E-13 4.281417072284137E-10 1.535386273289801E-11 1.187414820711866E-10 -2.866639444053241E-12
node -1.150357202112823E-14 2.601335352282917E-14 1.535386273289801E-11 1.95177212425533E-11 -1.490126614038246E-11 -1.257162070449421E-12
peri 4.780208611895396E-14 -1.084779556377438E-13 1.187414820711866E-10 -1.490126614038246E-11 5.413974629265425E-11 3.67364065673163E-13
i 2.35247743840505E-16 -5.801364617859607E-16 -2.866639444053241E-12 -1.257162070449421E-12 3.67364065673163E-13 1.381518091381429E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.40   n/a E2021B10  
diameter diameter 7.548 km 0.179 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 5.92 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Behrend, R. (2002) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Kryszczynska, A.; Colas, F.; Polinska, M.; Hirsch, R.; et al. (2012) Astron. Astrophys. 546, A72.]
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
geometric albedo albedo 0.366   0.047 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
B-V BV 0.952   0.032 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.27 deg.
U-B UB 0.493   0.052 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=1; phase=12.27 deg.
Tholen spectral type spec_T S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices
SMASSII spectral type spec_B Sl   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)

1601 Patry (1942 KA)          Discovered 1942-May-18 by Boyer, L. at Algiers
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1942 KA = 1942 KC = 1945 FA = 1949 OG = 1955 DL = A922 KB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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