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2058 Roka (1938 BH)
Classification: Main-belt Asteroid          SPK-ID: 2002058
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1459082850998862 3.2076e-08  
a 3.125743697397972 1.6791e-08 au
q 2.669671794848857 9.9672e-08 au
i 2.535106167431935 3.6944e-06 deg
node 95.32329601361664 9.2793e-05 deg
peri 180.8284999425393 9.4116e-05 deg
M 195.3885658691266 1.8337e-05 deg
tp 2459923.466569681052
(2022-Dec-09.96656968)
0.00010625 TDB
period 2018.498695667829
5.53
1.6264e-05
4.453e-08
d
yr
n .1783503753421513 1.4371e-09 deg/d
Q 3.581815599947088 1.9241e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2848  
   data-arc span      30233 days (82.77 yr)  
   first obs. used      1938-01-22  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4739  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:13:00  

Additional Information
 Earth MOID = 1.65327 au 
 Jupiter MOID = 1.53804 au 
 T_jup = 3.197 
[ 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 11.5   n/a MPO492774  
diameter diameter 24.273 km 0.234 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 10.04 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Addleman, D.; Covele, B.; Duncan, A.; Johnson, J.; et al. (2005) Minor Planet Bull. 32, 76-78.]
[Behrend, R. (2005) 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 0.120   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2058 Roka           Discovered 1938 Jan. 22 by G. Kulin at Budapest.
Named in memory of Gedeon Roka, a well-known popularizer of astronomy in Hungary for three decades.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5183Last Updated: 2006-03-21

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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
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
1943-Jul-07 08:20 00:02 Jupiter 1.80436836440543 1.80436725052463 1.80436947828572 2.05753712672508 1.81510368403412 2430912.847556217 1.7381252733598 71.9858466394047 7.44611997896105 -85.2010921850956 1634782.33444536 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
1953-Aug-19 01:38 00:01 Jupiter 1.52806557398162 1.52806523852661 1.5280659094362 1.40809070045641 0.934932501657885 2434608.568164081 1.46804517129013 174.285853488885 113.785017073171 3.15589345098146 2047800.28307881 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
1963-Sep-23 12:18 00:01 Jupiter 1.8690927362707 1.86909197148938 1.86909350105234 3.11303561077824 2.96389010423903 2438296.012614315 1.15401625471543 71.1455759927078 15.6515321755182 -74.1132611222633 2715257.52676043 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2025-Oct-09 00:43 < 00:01 Jupiter 1.60358834951967 1.60358803105948 1.6035886679795 1.48317204437834 1.06929434499239 2460957.529540752 0.39259506533671 101.46091096663 75.0648074192897 -33.6987977309958 2492796.13328538 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2035-Nov-16 06:08 < 00:01 Jupiter 1.64613672708449 1.64613625076506 1.64613720340384 1.97846645534764 1.69859531278784 2464647.755643446 0.679330498749521 66.3344932300271 15.8686036751196 84.2478330345788 2392233.00930518 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2097-Nov-28 06:45 00:02 Jupiter 1.81645685107485 1.81645574429039 1.8164579578592 2.06204263338006 1.8219248771657 2487305.780985319 2.13102667352883 85.3558853622099 7.11250348154065 -86.2135503035998 1802245.78076091 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2108-Jan-12 02:47 00:02 Jupiter 1.53841041089285 1.53841004434836 1.53841077743672 1.41887564331364 0.955009018638105 2491001.615884746 2.46128013052758 188.116801480366 107.46385018686 -1.27070692463876 1782848.49244559 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2118-Feb-16 16:37 00:03 Jupiter 1.86725904216734 1.86725756932656 1.86726051501097 3.09767333619925 2.94759968104651 2494690.192134473 2.69298065026323 148.981997144555 15.7556673869033 -72.3310446683124 2694135.7411183 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2180-Mar-01 19:39 00:04 Jupiter 1.61352947373588 1.61352810390232 1.61353084357064 1.48196660675217 1.07066556524674 2517349.318973835 4.25701144803242 243.94774280096 103.182299164053 49.213436858725 1571446.66030239 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13
2190-Apr-11 23:29 00:05 Jupiter 1.64428667400779 1.64428493014446 1.64428841787617 1.9600780113171 1.67679588692829 2521042.478289272 4.64884365329339 236.148341005247 21.3030161062766 73.6895327267829 1902053.13245195 T 39 CATAB v2.0f-lin.ifort 2020-Nov-13 04:13:07 2020-Nov-13 04:13

Alternate Designations
 1938 BH = 1951 NP = 1962 NA = 1963 UM = 1974 SZ1 = 1978 AE = 1985 UL3 
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