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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1320772938679288 3.3533e-08  
a 3.186883029462874 1.4475e-08 au
q 2.765968143057791 1.0861e-07 au
i 2.625845268760683 3.5763e-06 deg
node 115.7155863960062 7.5598e-05 deg
peri 197.1256580162469 7.6643e-05 deg
M 220.8707024782913 1.3928e-05 deg
tp 2460003.589048767410
(2023-Feb-28.08904877)
8.1668e-05 TDB
period 2078.009899468922
5.69
1.4157e-05
3.876e-08
d
yr
n .1732426780507664 1.1803e-09 deg/d
Q 3.607797915867957 1.6387e-08 au
  Orbit Determination Parameters
   # obs. used (total)      3283  
   data-arc span      26145 days (71.58 yr)  
   first obs. used      1949-08-24  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45722  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 20:01:14  

Additional Information
 Earth MOID = 1.75 au 
 Jupiter MOID = 1.6581 au 
 T_jup = 3.183 
[ 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 12.00   n/a E2021B10  
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 1.7370720776485 1.73707134168194 1.73707281361545 2.51706551335998 2.31525131938432 2417135.232713692 2.06076824103114 75.9801466489244 6.92519544892251 -86.3089808188808 2532016.59564904 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
1916-Jul-21 19:17 00:02 Jupiter 1.96690646344902 1.96690561989898 1.96690730700019 3.85631540848967 3.74297939087048 2421066.303735518 1.832582466167 96.5693296201586 15.632503289772 -71.6341250132633 3890527.74906215 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
1992-Jul-06 02:02 < 00:01 Jupiter 1.99134851073186 1.99134806515723 1.99134895630649 2.78384011723977 2.62660681597771 2448809.584553323 0.532563418844378 38.8610183460602 11.6247533842264 -79.1968242330388 3383510.22269232 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2003-May-04 02:44 < 00:01 Jupiter 1.76369396949788 1.76369359972263 1.76369433927304 2.03610817953676 1.78472039827306 2452763.613641924 0.31348166671937 41.1177848747824 8.10447996270122 -82.5248666027428 3005804.33022229 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2014-Mar-04 00:42 < 00:01 Jupiter 1.64172818989525 1.64172789338302 1.64172848640729 1.79769719106829 1.48318854626948 2456720.529181205 0.167853600313682 51.9021083306834 23.2883945335085 -82.3955083248993 3114500.66158437 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2024-Dec-23 12:47 < 00:01 Jupiter 1.69230287676617 1.69230258125191 1.69230317228033 2.21368245228789 1.97467985937673 2460668.032479954 0.31370222916244 43.8864608094171 3.85642093720773 88.7702935808283 3710535.70840954 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2035-Oct-01 00:31 < 00:01 Jupiter 1.88600473891154 1.88600433292367 1.88600514489941 3.34716488872381 3.21018596573077 2464601.521246218 0.52802629231224 39.4774154623793 13.7855280950864 -81.3267122267033 3917186.39192776 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2122-Jul-08 10:14 00:02 Jupiter 1.84582245191231 1.84582161472847 1.84582328909668 2.25119057048561 2.03717611396503 2496292.926519079 1.92133727755165 87.9369471056561 4.15843785027111 -82.0588396324642 2576374.26804503 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2133-May-10 11:07 00:02 Jupiter 1.68319984309559 1.68319930617989 1.68320038001186 1.83863364233818 1.54082136508219 2500251.963537280 2.15984327791131 94.1247755840381 20.2144050031076 -87.5551717874733 2731934.76879651 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2144-Mar-08 07:56 00:02 Jupiter 1.66898947141476 1.66898909103591 1.66898985179343 2.00410915406344 1.73246676546171 2504206.830284465 2.47867857542883 50.4783790776643 18.7979296197495 -80.8630821019306 2273321.9941631 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01
2154-Dec-21 01:10 00:03 Jupiter 1.81255696215735 1.81255597081236 1.81255795350317 2.86671153166142 2.69878099311357 2508146.548452623 2.81031532295453 92.1666339558464 13.0554810105096 -76.7298453506322 2534961.75247422 T 39 CATAB v2.0g-lin.ifort 2021-May-03 20:01:53 2021-May-03 20:01

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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