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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1459082852216895 3.2038e-08  
a 3.125743697494094 1.6762e-08 au
q 2.669671794550227 9.9589e-08 au
i 2.535106151122448 3.6916e-06 deg
node 95.3232966527117 9.2617e-05 deg
peri 180.8284992701283 9.3941e-05 deg
M 195.3885658762323 1.8336e-05 deg
tp 2459923.466569683784
(2022-Dec-09.96656968)
0.00010625 TDB
period 2018.498695760936
5.53
1.6236e-05
4.445e-08
d
yr
n .1783503753339245 1.4346e-09 deg/d
Q 3.58181560043796 1.9207e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2860  
   data-arc span      30247 days (82.81 yr)  
   first obs. used      1938-01-22  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:04:08  

Additional Information
 Earth MOID = 1.65327 au 
 Jupiter MOID = 1.53804 au 
 T_jup = 3.197 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456442.5 (2013-May-30.0) TDB
Reference: JPL 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1516021811264351 3.2527e-08  
q 2.645405965207019 1.0179e-07 au
tp 2455882.584821582652
(2011-Nov-17.08482158)
8.9348e-05 TDB
node 95.48011159069286 9.2228e-05 deg
peri 179.6052690219356 9.3426e-05 deg
i 2.540851419656919 3.7065e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2860  
   data-arc span      30247 days (82.81 yr)  
   first obs. used      1938-01-22  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47298  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:04:08  

Additional Information
 Jupiter MOID = 1.53804 au 
 T_jup = 3.197 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.057979484988426E-15 -3.279965707987893E-15 1.125926780576562E-13 1.578850364154986E-15 1.651704024446775E-14 7.095758566788057E-17
q -3.279965707987893E-15 1.036025913271722E-14 -9.934662048173037E-14 -6.419812067056647E-15 -1.340681310328959E-15 -1.236167717617876E-16
tp 1.125926780576562E-13 -9.934662048173037E-14 7.983126048356313E-9 -5.347667206805984E-12 1.360448088326084E-9 1.044001162992904E-13
node 1.578850364154986E-15 -6.419812067056647E-15 -5.347667206805984E-12 8.50604321419445E-9 -8.498178329472293E-9 1.581868760193272E-12
peri 1.651704024446775E-14 -1.340681310328959E-15 1.360448088326084E-9 -8.498178329472293E-9 8.728471211327196E-9 -1.565658488614831E-12
i 7.095758566788057E-17 -1.236167717617876E-16 1.044001162992904E-13 1.581868760193272E-12 -1.565658488614831E-12 1.373818845793732E-11

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. 2020-October); 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

[ hide close-approach data ]
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 1.80436836300053 1.80436725058212 1.80436947541842 2.05753718148712 1.81510374590905 2430912.847562773 1.7355950488714 71.8795748487119 7.44008500150431 -85.1888330191927 1637016.0918304 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
1953-Aug-19 01:38 00:01 Jupiter 1.52806557358912 1.52806523856268 1.52806590861513 1.40809070177451 0.934932503490765 2434608.568160841 1.46589936729599 174.189226763689 113.684958415297 3.19031734451734 2049192.6305004 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
1963-Sep-23 12:18 00:01 Jupiter 1.8690927369986 1.86909197261092 1.8690935013866 3.11303553968354 2.96389002962633 2438296.012619463 1.15223150627607 71.0454116241691 15.6464112939459 -74.1014239967963 2716260.49524248 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2025-Oct-09 00:43 < 00:01 Jupiter 1.60358834939862 1.60358803098191 1.60358866781497 1.48317205647433 1.06929436173292 2460957.529545737 0.391311617546157 101.412687366307 75.0484015108061 -33.7249183527276 2493763.38970434 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2035-Nov-16 06:08 < 00:01 Jupiter 1.64613672597969 1.64613625107862 1.64613720088067 1.97846650240924 1.69859536740028 2464647.755637588 0.677582740036667 66.2105271762582 15.8247667338609 84.2756382473044 2398028.33452651 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2097-Nov-28 06:45 00:02 Jupiter 1.8164568531074 1.81645574851057 1.81645795770412 2.06204266181954 1.82192490963971 2487305.780991095 2.12636585523193 85.1447701289506 7.11069204490539 -86.2195231310497 1803961.48664233 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2108-Jan-12 02:47 00:02 Jupiter 1.53841041021513 1.53841004484062 1.53841077558894 1.41887561115035 0.955008970598499 2491001.615899668 2.45613472653349 187.467775195507 107.409850360074 -1.33059733413614 1789020.93413135 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2118-Feb-16 16:37 00:03 Jupiter 1.8672590398596 1.86725757046334 1.86726050925874 3.09767331473202 2.94759965829611 2494690.192137866 2.68764978043639 148.700485343128 15.7466260309929 -72.3412029712097 2696831.21599959 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2180-Mar-01 19:39 00:04 Jupiter 1.61352947417922 1.61352810630302 1.61353084205661 1.4819665684134 1.07066551231467 2517349.318963202 4.24850095922348 243.615533656116 103.132908971459 49.1664943126051 1571553.91272545 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04
2190-Apr-11 23:29 00:05 Jupiter 1.64428667316756 1.64428493376876 1.6442884125714 1.9600780223368 1.67679589965271 2521042.478287925 4.63970061066938 235.640763346427 21.268572657336 73.7004198591445 1904372.29866636 T 41 CATAB v2.0f-lin.ifort 2020-Dec-18 02:04:16 2020-Dec-18 02:04

Alternate Designations
 1938 BH = 1951 NP = 1962 NA = 1963 UM = 1974 SZ1 = 1978 AE = 1985 UL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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