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7695 Premysl (1984 WA1)
Classification: Main-belt Asteroid          SPK-ID: 2007695
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2604239846267626 5.2229e-08  
a 2.298836578488039 7.7477e-09 au
q 1.70016439671243 1.1953e-07 au
i 26.01530302950194 5.5617e-06 deg
node 54.59324741842632 8.1282e-06 deg
peri 323.3297220329864 1.3174e-05 deg
M 89.15536695947897 1.3167e-05 deg
tp 2458685.213361416804
4.5926e-05 TDB
period 1273.094304480152
n .2827755954394913 1.4296e-09 deg/d
Q 2.897508760263648 9.7654e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1432  
   data-arc span      13707 days (37.53 yr)  
   first obs. used      1983-05-06  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47426  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 20:04:41  

Additional Information
 Earth MOID = .748091 au 
 Jupiter MOID = 2.62735 au 
 T_jup = 3.417 
[ 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 14.1   n/a MPO431587  
diameter diameter 3.393 km 0.216 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 11.734 h n/a LCDB (Rev. 2020-October); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2012)]
geometric albedo albedo 0.385   0.118 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

7695 Přemysl           Discovered 1984 Nov. 27 by A. Mrkos at Klet.
Named for a mythical hero Přemysl, called Ploughman. He married princess Libuše, and they became the mythical founders of the royal dynasty of the Přemyslids, ruling over Bohemia until 1306. Bohemian kings Přemysl Otakar I (?-1230) and Přemysl Otakar II (?-1278) are considered the most reputable members of this dynasty. Name suggested by J. Ticha, M. Tichy and Z. Moravec.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980610/MPCPages.arcLast Updated: 2009-11-17

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
2167-Sep-17 21:59 < 00:01 Hebe 0.024814651431992 0.0248118204176778 0.0248174860797294 7.50262882517232 7.50262879178082 2512800.416155519 0.785030001975829 507.119373790689 33.1946319654604 74.2590571191323 107634.328602637 T 30 CATAB v2.0f-lin.ifort 2020-Dec-17 20:04:45 2020-Dec-17 20:04

Alternate Designations
 1984 WA1 = 1991 VF 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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