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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1459082834343468 3.2305e-08  
a 3.12574369631756 1.6976e-08 au
q 2.669671799132135 1.0016e-07 au
i 2.535106182634637 3.7102e-06 deg
node 95.3232956533987 9.4081e-05 deg
peri 180.8285009275472 9.5397e-05 deg
M 195.3885656270423 1.8345e-05 deg
tp 2459923.466570559870
(2022-Dec-09.96657056)
0.00010627 TDB
period 2018.498694621289
5.53
1.6444e-05
4.502e-08
d
yr
n .1783503754346214 1.4529e-09 deg/d
Q 3.581815593502986 1.9453e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2784  
   data-arc span      30193 days (82.66 yr)  
   first obs. used      1938-01-22  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47694  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 15:37:22  

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

[ 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 08:21 00:02 Jupiter 1.80436838444836 1.80436726167287 1.80436950722333 2.05753717226183 1.81510373852576 2430912.847576662 1.75460654157439 72.7231682864894 7.47880548260447 -85.2749231907988 1620645.64341997 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
1953-Aug-19 01:38 00:01 Jupiter 1.52806558031585 1.52806524190098 1.52806591873029 1.40809070886863 0.934932516785111 2434608.568189090 1.4819981086307 174.942642463637 114.372695100916 2.95848640152741 2038485.2944247 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
1963-Sep-23 12:18 00:01 Jupiter 1.86909272820003 1.86909196128849 1.8690934951119 3.1130356661556 2.96389016174282 2438296.012622566 1.16562795680825 71.7755777515014 15.6857979160598 -74.2014703391095 2708110.22865478 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2025-Oct-09 00:43 < 00:01 Jupiter 1.60358835106527 1.60358803243371 1.60358866969647 1.48317204264622 1.06929434306596 2460957.529526935 0.40122557552304 101.739755846123 75.1979532700036 -33.6185903947674 2487761.55303164 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2035-Nov-16 06:08 < 00:01 Jupiter 1.6461367414913 1.64613625494846 1.64613722803405 1.97846647887485 1.69859534284272 2464647.755636831 0.691011947695077 67.1621683030338 16.1665071986532 84.0417638807491 2352657.52156128 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2097-Nov-28 06:45 00:02 Jupiter 1.81645682466986 1.81645570261451 1.8164579467252 2.0620425402664 1.82192476805977 2487305.780947186 2.16176670976922 86.764844693552 7.12115542394813 -86.1794031222148 1789281.23397513 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2108-Jan-12 02:47 00:03 Jupiter 1.53841042203579 1.53841004763572 1.53841079643516 1.41887569194581 0.955009095067706 2491001.615850923 2.49520953676161 192.400798732605 107.7657647744 -0.875543444204135 1743111.16515393 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2118-Feb-16 16:37 00:03 Jupiter 1.8672590802401 1.86725758377583 1.86726057670734 3.09767348888944 2.94759984464859 2494690.192095712 2.7280927602747 150.852546451279 15.8219065766546 -72.2551227438088 2674825.90777896 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2180-Mar-01 19:39 00:04 Jupiter 1.61352944645889 1.61352806331278 1.61353082960629 1.48196655284945 1.07066548234839 2517349.318902167 4.31303880314948 246.217105581286 103.496294853243 49.5115408428306 1570409.10235609 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38
2190-Apr-11 23:29 00:05 Jupiter 1.64428672136769 1.6442849474232 1.64428849531731 1.96007823802087 1.67679616078048 2521042.478214472 4.70904096864118 239.520932175048 21.5193714372997 73.6165894961553 1887368.65544182 T 37 CATAB v2.0f-lin.ifort 2020-Oct-22 15:37:57 2020-Oct-22 15:38

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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