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1807 Slovakia (1971 QA)
Classification: Main-belt Asteroid          SPK-ID: 2001807
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .178637039610541 3.2896e-08  
a 2.225752331876857 5.1919e-09 au
q 1.828150524404117 7.3075e-08 au
i 3.491874613071278 3.2859e-06 deg
node 236.343791503459 6.6841e-05 deg
peri 140.3931965092244 6.7704e-05 deg
M 220.7356195409068 1.2655e-05 deg
tp 2459469.692685612161
(2021-Sep-12.19268561)
4.3559e-05 TDB
period 1212.868403704941
3.32
4.2438e-06
1.162e-08
d
yr
n .2968170321696159 1.0385e-09 deg/d
Q 2.623354139349597 6.1193e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2457  
   data-arc span      33346 days (91.30 yr)  
   first obs. used      1928-10-17  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46046  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:05:23  

Additional Information
 Earth MOID = .8315 au 
 Jupiter MOID = 2.84607 au 
 T_jup = 3.622 
[ 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 MPO431515  
diameter diameter 9.135 km 0.092 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 308.6 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Galad, A.; Kornos, L.; Husarik, M. (2009) Minor Planet Bull. 36, 149-151.]
geometric albedo albedo 0.309   0.073 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)

1807 Slovakia (1971 QA)          Discovered 1971-Aug-20 by Antal, M. at Skalnate Pleso
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1971 QA = 1928 UE = 1948 UC = 1951 JA = 1951 QK = 1954 NA = 1960 GB = 1971 TM1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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