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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1458457199781944 2.1164e-08  
a 3.125687738133921 1.4241e-08 au
q 2.669819559538765 7.1619e-08 au
i 2.534971029762827 5.7148e-07 deg
node 95.32183303460673 1.0553e-05 deg
peri 180.8848572996147 1.1246e-05 deg
M 230.9846611345342 9.3153e-06 deg
tp 2459923.861944421743
(2022-Dec-10.36194442)
5.4571e-05 TDB
period 2018.444491033562
5.53
1.3794e-05
3.777e-08
d
yr
n .178355164880288 1.2189e-09 deg/d
Q 3.581555916729076 1.6318e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3172  
   data-arc span      30368 days (83.14 yr)  
   first obs. used      1938-01-22  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4647  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 13:17:41  

Additional Information
 Earth MOID = 1.65156 au 
 Jupiter MOID = 1.53759 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 11.54   n/a E2021B10  
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

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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 1.80436820820048 1.80436733718505 1.80436907921582 2.05753668455317 1.81510316184326 2430912.847510249 1.55893885295807 52.6819606931985 3.50787022167972 -83.5211801344995 6067862.85338601 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
1953-Aug-19 01:38 00:01 Jupiter 1.52806558424862 1.52806534043001 1.52806582806696 1.40809021042793 0.934931770890558 2434608.568143434 1.31424687754046 139.435207217506 17.4344173139982 12.6689885773922 5101998.05160013 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
1963-Sep-23 12:18 00:01 Jupiter 1.86909285111565 1.86909229745199 1.86909340477973 3.1130362437334 2.96389077928439 2438296.012579890 1.02917278055232 55.313876976466 4.71257754648581 -72.29878160723 7196956.01316527 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2025-Oct-09 00:43 < 00:01 Jupiter 1.60358827947765 1.60358805177112 1.603588507184 1.48317169840994 1.06929384626737 2460957.529552782 0.287182662432275 61.5094401791279 18.5821100229175 7.99509508058402 3945252.78331415 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2035-Nov-16 06:08 < 00:01 Jupiter 1.64613683272448 1.64613657198519 1.64613709346379 1.97846653835763 1.69859543058877 2464647.755625307 0.559607391723009 29.760143718307 6.95083386410889 80.5441573874089 5896391.34573916 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2097-Nov-28 06:45 00:02 Jupiter 1.81645689079646 1.81645591113371 1.81645787045901 2.06204294849206 1.8219252408181 2487305.781213043 1.81875248634867 59.5204602989617 3.7096919307563 -88.8918333966749 5723911.14894911 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2108-Jan-12 02:47 00:02 Jupiter 1.53841038394532 1.53841015894106 1.53841060894932 1.41887501816214 0.955008082924259 2491001.616202318 2.11964626574541 111.51526935989 27.1703453261053 5.79032882184707 3257273.79406787 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2118-Feb-16 16:37 00:02 Jupiter 1.86725882224844 1.86725754935112 1.86726009514819 3.09767209603368 2.94759836046439 2494690.192505903 2.33859335410864 128.565166925656 4.78617214883504 -71.2942252645125 7315575.32334786 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2180-Mar-01 19:42 00:04 Jupiter 1.61353005741775 1.61352878921218 1.61353132562378 1.48196790236948 1.07066753865201 2517349.320493889 3.69354513632678 224.082539514663 38.5878479019251 42.876994448356 3863434.70833106 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18
2190-Apr-11 23:31 00:04 Jupiter 1.64428577406485 1.64428430111933 1.64428724701448 1.96007333452676 1.67679025358191 2521042.480089402 4.04572554211903 198.944103082723 6.86440096112191 73.4749157675769 5968611.2870439 T 45 CATAB v2.0f-lin.ifort 2021-Apr-12 13:18:49 2021-Apr-12 13:18

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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