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2164 Lyalya (1972 RM2)
Classification: Main-belt Asteroid          SPK-ID: 2002164
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1321879540133482 3.2708e-08  
a 3.186129197627027 1.4124e-08 au
q 2.764961297770519 1.0657e-07 au
i 2.625858522683559 3.415e-06 deg
node 115.7158143201699 7.5491e-05 deg
peri 197.2243615172596 7.6526e-05 deg
M 254.7258896823424 1.3962e-05 deg
tp 2460003.952857923509
(2023-Feb-28.45285792)
8.1561e-05 TDB
period 2077.272637998097
5.69
1.3813e-05
3.782e-08
d
yr
n .1733041649973006 1.1524e-09 deg/d
Q 3.607297097483534 1.5991e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3503  
   data-arc span      26250 days (71.87 yr)  
   first obs. used      1949-08-24  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44824  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 08:24:52  

Additional Information
 Earth MOID = 1.75039 au 
 Jupiter MOID = 1.65823 au 
 T_jup = 3.183 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457074.5 (2015-Feb-21.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1299681440874935 3.2476e-08  
q 2.776978319428831 1.0523e-07 au
tp 2457920.852658999165
(2017-Jun-16.35265900)
8.0648e-05 TDB
node 115.7475940458867 7.5394e-05 deg
peri 196.0976515611629 7.6475e-05 deg
i 2.625854635409373 3.4153e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      3503  
   data-arc span      26250 days (71.87 yr)  
   first obs. used      1949-08-24  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44824  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 08:24:52  

Additional Information
 Jupiter MOID = 1.65823 au 
 T_jup = 3.183 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.054676200784296E-15 -3.394209795818237E-15 5.979507265668536E-13 2.239512437058686E-15 9.840760024973065E-14 1.688427266557692E-16
q -3.394209795818237E-15 1.107342005040061E-14 -1.79261641917929E-12 -1.21159080377238E-14 -3.061934176820787E-13 -6.083181814511481E-16
tp 5.979507265668536E-13 -1.79261641917929E-12 6.504025396352317E-9 -1.215073327536261E-11 1.050305233075261E-9 4.574217461225787E-14
node 2.239512437058686E-15 -1.21159080377238E-14 -1.215073327536261E-11 5.684192862390989E-9 -5.679989421991415E-9 6.76093177674551E-11
peri 9.840760024973065E-14 -3.061934176820787E-13 1.050305233075261E-9 -5.679989421991415E-9 5.848455647876584E-9 -6.753361122059246E-11
i 1.688427266557692E-16 -6.083181814511481E-16 4.574217461225787E-14 6.76093177674551E-11 -6.753361122059246E-11 1.166421415070124E-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 11.99   n/a MPO636095  
diameter diameter 19.972 km 0.160 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 7.705 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:
[Ditteon, R.; Black, S.; Masner, Z.; Osborne, J.; Trent, L. (2018) Minor Planet Bull. 45, 338-340.]
geometric albedo albedo 0.084   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

2164 Lyalya           Discovered 1972 Sept. 11 by N. S. Chernykh at the Crimean Astrophysical Observatory.
Named in memory of Elena (Lyalya) Konstantinovna Ubijvovk (1918-1942), a student in astronomy at Kharkov University who perished with other members of the Resistance during the Great Patriotic War.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5285Last Updated: 2007-10-23

[ 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
1905-Oct-16 17:35 00:02 Jupiter 1.73707208521509 1.73707135037121 1.73707282005926 2.51706554323178 2.31525135277737 2417135.232685090 2.04305728177206 74.6733065313177 6.83376107899641 -86.1745687587674 2606272.36160987 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
1916-Jul-21 19:17 00:02 Jupiter 1.96690648003463 1.96690564396348 1.96690731610689 3.85631541552897 3.74297939909308 2421066.303716049 1.81639697435546 95.2413561024145 15.3039163350527 -71.4914385245856 3969837.89340331 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
1992-Jul-06 02:02 < 00:01 Jupiter 1.99134850646181 1.99134806335245 1.99134894957105 2.78384010983142 2.62660680777863 2448809.584549744 0.530599798566201 38.128521072865 11.5133323344003 -78.8327254597019 3413432.60802007 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2003-May-04 02:44 < 00:01 Jupiter 1.76369396128375 1.76369359936493 1.76369432320236 2.03610816014422 1.78472037489571 2452763.613641363 0.31309389812482 41.0387854254023 7.815420182069 -82.4622935215417 3080252.25468374 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2014-Mar-04 00:42 < 00:01 Jupiter 1.6417281793419 1.64172789596056 1.64172846272315 1.79769715988624 1.48318850623923 2456720.529183223 0.165772725395736 51.2670256778196 22.3775753939296 -83.0769655776923 3252274.74560402 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2024-Dec-23 12:47 < 00:01 Jupiter 1.69230286605492 1.69230258082877 1.69230315128098 2.21368235614178 1.97467974998942 2460668.032495626 0.306025703765247 42.4979712270472 3.7435395794189 88.6120517100584 3876244.62585782 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2035-Oct-01 00:31 < 00:01 Jupiter 1.88600473057275 1.88600432737344 1.88600513377206 3.34716477266748 3.21018584410375 2464601.521263612 0.518801952862977 38.2770733975761 13.6161215354351 -80.7056312822016 3975951.04799415 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2122-Jul-08 10:14 00:02 Jupiter 1.84582246580616 1.84582163082034 1.8458233007925 2.25119059231022 2.03717613977796 2496292.926549940 1.89689662351669 86.3865927346846 4.00391648628865 -82.0192884848444 2609581.48791993 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2133-May-10 11:08 00:02 Jupiter 1.68319984265622 1.68319930625777 1.68320037905526 1.83863363502377 1.5408213562688 2500251.963579460 2.13262001886127 93.0524399091706 19.3996268018983 -88.0606371264172 2816870.01133055 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2144-Mar-08 07:56 00:02 Jupiter 1.66898945410062 1.66898909418328 1.66898981401778 2.00410907262646 1.73246666821685 2504206.830324853 2.44693287473898 49.7086265418538 18.0645844689406 -81.2339689672478 2396043.27995666 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25
2154-Dec-21 01:10 00:03 Jupiter 1.81255693538277 1.81255595990213 1.81255791086423 2.86671136370018 2.69878081214321 2508146.548499364 2.77530633134994 90.7954475927475 12.78297526241 -76.6784142029629 2620551.33751001 T 42 CATAB v2.0g-lin.ifort 2021-Aug-25 08:25:24 2021-Aug-25 08:25

Alternate Designations
 1972 RM2 = 1949 QF1 = 1953 FJ = 1955 RW = 1955 SB2 = 1976 GO7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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