******************************************************************************* JPL/HORIZONS 199145 (2005 YY128) 2025-Dec-12 17:55:10 Rec #: 199145 (+COV) Soln.date: 2025-Nov-18_05:55:41 # obs: 611 (2005-2025) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458740.5 ! 2019-Sep-14.00 (TDB) Residual RMS= .22548 EC= .731669611782113 QR= .4426131339208919 TP= 2458490.510188831 OM= 300.3208929356403 W= 314.7690365611988 IN= 3.77107575105766 A= 1.649508044394456 MA= 116.304019836855 ADIST= 2.856402954868019 PER= 2.11856 N= .46523504 ANGMOM= .015060039 DAN= .50582 DDN= 1.58124 L= 255.1520237 B= -2.6763212 MOID= .0294325 TP= 2019-Jan-07.0101888310 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 15.59 H= 18.3 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#142, PHA OCC=0 radar( 3 delay, 0 Dop.) 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri Dec 12 17:55:10 2025 Pasadena, USA / Horizons ******************************************************************************* Target body name: 199145 (2005 YY128) {source: JPL#142} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Feb-04 00:00:00.0000 UT Stop time : A.D. 2023-Feb-18 00:00:00.0000 UT Step-size : 360 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -6378.137 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : ITRF93 {East-longitude positive} Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441} Rel. light bend : Sun {source: DE441} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Small-body perts: Yes {source: SB441-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian EOP file : eop.251212.p260310 EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-DEC-12. PREDICTS-> 2026-MAR-09 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO ) Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2458740.5 ! 2019-Sep-14.00 (TDB) Residual RMS= .22548 EC= .731669611782113 QR= .4426131339208919 TP= 2458490.510188831 OM= 300.3208929356403 W= 314.7690365611988 IN= 3.77107575105766 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 1.308944958183865E+00 Y= 1.998823146459492E+00 Z= 1.029127916140669E+00 VX=-3.070303928626761E-03 VY= 5.692750305994368E-03 VZ= 2.503250967735497E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= 15.59 H= 18.3 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ********************************************************************************************************************************* Date__(UT)__HR:MN R.A._____(ICRF)_____DEC APmag S-brt delta deldot S-O-T /r T-O-M/MN_Illu% Cnst ********************************************************************************************************************************* $$SOE 2023-Feb-04 00:00 10 29 40.63 +01 20 29.2 15.867 n.a. 0.17581448836561 -25.0366708 154.8610 /L 44.9/ 97.0512 Sex 2023-Feb-04 06:00 10 29 38.83 +01 07 19.8 15.815 n.a. 0.17220265884938 -24.9909419 154.9714 /L 42.2/ 97.7685 Sex 2023-Feb-04 12:00 10 29 36.77 +00 53 38.7 15.763 n.a. 0.16859747410467 -24.9446136 155.0744 /L 39.6/ 98.3802 Sex 2023-Feb-04 18:00 10 29 34.44 +00 39 24.1 15.709 n.a. 0.16499902648788 -24.8976042 155.1695 /L 37.0/ 98.8852 Sex 2023-Feb-05 00:00 10 29 31.82 +00 24 33.5 15.655 n.a. 0.16140742083821 -24.8498223 155.2561 /L 34.4/ 99.2821 Sex 2023-Feb-05 06:00 10 29 28.91 +00 09 04.8 15.600 n.a. 0.15782277594335 -24.8011660 155.3334 /L 31.8/ 99.5701 Sex 2023-Feb-05 12:00 10 29 25.69 -00 07 04.7 15.544 n.a. 0.15424522620088 -24.7515207 155.4006 /L 29.4/ 99.7481 Sex 2023-Feb-05 18:00 10 29 22.14 -00 23 57.9 15.488 n.a. 0.15067492350568 -24.7007583 155.4570 /L 27.0/ 99.8156 Sex 2023-Feb-06 00:00 10 29 18.24 -00 41 37.8 15.430 n.a. 0.14711203939973 -24.6487346 155.5016 /L 24.7/ 99.7721 Sex 2023-Feb-06 06:00 10 29 13.97 -01 00 07.8 15.372 n.a. 0.14355676752706 -24.5952873 155.5334 /L 22.6/ 99.6170 Sex 2023-Feb-06 12:00 10 29 09.31 -01 19 31.7 15.313 n.a. 0.14000932644472 -24.5402331 155.5512 /L 20.6/ 99.3504 Sex 2023-Feb-06 18:00 10 29 04.24 -01 39 53.4 15.253 n.a. 0.13646996285054 -24.4833649 155.5538 /L 18.9/ 98.9722 Sex 2023-Feb-07 00:00 10 28 58.73 -02 01 17.5 15.192 n.a. 0.13293895530022 -24.4244481 155.5398 /L 17.6/ 98.4826 Sex 2023-Feb-07 06:00 10 28 52.74 -02 23 48.9 15.130 n.a. 0.12941661850100 -24.3632158 155.5077 /L 16.6/ 97.8820 Sex 2023-Feb-07 12:00 10 28 46.24 -02 47 33.2 15.068 n.a. 0.12590330828652 -24.2993643 155.4558 /L 16.1/ 97.1710 Sex 2023-Feb-07 18:00 10 28 39.20 -03 12 36.3 15.004 n.a. 0.12239942740025 -24.2325466 155.3822 /L 16.1/ 96.3504 Sex 2023-Feb-08 00:00 10 28 31.57 -03 39 05.1 14.940 n.a. 0.11890543224101 -24.1623652 155.2850 /L 16.6/ 95.4210 Sex 2023-Feb-08 06:00 10 28 23.31 -04 07 07.0 14.874 n.a. 0.11542184075850 -24.0883636 155.1616 /L 17.6/ 94.3842 Sex 2023-Feb-08 12:00 10 28 14.35 -04 36 50.4 14.808 n.a. 0.11194924172778 -24.0100156 155.0097 /L 18.9/ 93.2411 Sex 2023-Feb-08 18:00 10 28 04.65 -05 08 24.7 14.740 n.a. 0.10848830568460 -23.9267126 154.8262 /L 20.6/ 91.9934 Sex 2023-Feb-09 00:00 10 27 54.13 -05 42 00.5 14.672 n.a. 0.10503979786816 -23.8377487 154.6080 /L 22.6/ 90.6427 Sex 2023-Feb-09 06:00 10 27 42.72 -06 17 49.6 14.602 n.a. 0.10160459360084 -23.7423019 154.3514 /L 24.7/ 89.1909 Sex 2023-Feb-09 12:00 10 27 30.32 -06 56 05.5 14.532 n.a. 0.09818369663785 -23.6394113 154.0525 /L 27.0/ 87.6402 Sex 2023-Feb-09 18:00 10 27 16.83 -07 37 03.2 14.460 n.a. 0.09477826115155 -23.5279493 153.7065 /L 29.4/ 85.9929 Sex 2023-Feb-10 00:00 10 27 02.13 -08 21 00.1 14.388 n.a. 0.09138961818197 -23.4065875 153.3083 /L 31.9/ 84.2515 Sex 2023-Feb-10 06:00 10 26 46.08 -09 08 15.8 14.314 n.a. 0.08801930759758 -23.2737543 152.8520 /L 34.4/ 82.4186 Sex 2023-Feb-10 12:00 10 26 28.53 -09 59 12.8 14.240 n.a. 0.08466911688065 -23.1275821 152.3309 /L 37.0/ 80.4972 Sex 2023-Feb-10 18:00 10 26 09.28 -10 54 16.8 14.165 n.a. 0.08134112839523 -22.9658421 151.7374 /L 39.6/ 78.4904 Sex 2023-Feb-11 00:00 10 25 48.10 -11 53 57.5 14.089 n.a. 0.07803777723323 -22.7858627 151.0628 /L 42.2/ 76.4016 Hya 2023-Feb-11 06:00 10 25 24.74 -12 58 49.0 14.012 n.a. 0.07476192228602 -22.5844268 150.2971 /L 44.9/ 74.2343 Hya 2023-Feb-11 12:00 10 24 58.86 -14 09 30.9 13.935 n.a. 0.07151693388082 -22.3576441 149.4288 /L 47.6/ 71.9924 Hya 2023-Feb-11 18:00 10 24 30.08 -15 26 49.0 13.858 n.a. 0.06830680217589 -22.1007901 148.4445 /L 50.2/ 69.6800 Hya 2023-Feb-12 00:00 10 23 57.92 -16 51 36.6 13.781 n.a. 0.06513627153619 -21.8081060 147.3290 /L 52.8/ 67.3014 Hya 2023-Feb-12 06:00 10 23 21.79 -18 24 55.6 13.704 n.a. 0.06201100729864 -21.4725485 146.0644 /L 55.5/ 64.8614 Hya 2023-Feb-12 12:00 10 22 40.95 -20 07 58.1 13.627 n.a. 0.05893780259932 -21.0854838 144.6303 /L 58.0/ 62.3650 Hya 2023-Feb-12 18:00 10 21 54.45 -22 02 07.7 13.553 n.a. 0.05592483406989 -20.6363160 143.0027 /L 60.6/ 59.8173 Hya 2023-Feb-13 00:00 10 21 01.09 -24 09 01.2 13.481 n.a. 0.05298197575430 -20.1120529 141.1541 /L 63.0/ 57.2242 Hya 2023-Feb-13 06:00 10 19 59.28 -26 30 29.7 13.412 n.a. 0.05012117964716 -19.4968219 139.0531 /L 65.4/ 54.5916 Hya 2023-Feb-13 12:00 10 18 46.90 -29 08 39.3 13.348 n.a. 0.04735692712547 -18.7713831 136.6637 /L 67.6/ 51.9260 Ant 2023-Feb-13 18:00 10 17 21.05 -32 05 50.0 13.292 n.a. 0.04470674532530 -17.9127400 133.9464 /L 69.6/ 49.2343 Ant 2023-Feb-14 00:00 10 15 37.66 -35 24 33.0 13.246 n.a. 0.04219176157229 -16.8940440 130.8581 /L 71.5/ 46.5236 Ant 2023-Feb-14 06:00 10 13 30.83 -39 07 21.9 13.212 n.a. 0.03983723086281 -15.6851340 127.3548 /L 73.1/ 43.8016 Ant 2023-Feb-14 12:00 10 10 51.68 -43 16 39.6 13.197 n.a. 0.03767290933143 -14.2542321 123.3950 /L 74.4/ 41.0766 Vel 2023-Feb-14 18:00 10 07 26.22 -47 54 14.2 13.204 n.a. 0.03573305892782 -12.5714732 118.9459 /L 75.3/ 38.3570 Vel 2023-Feb-15 00:00 10 02 51.05 -53 00 44.2 13.241 n.a. 0.03405577110155 -10.6148824 113.9923 /L 75.7/ 35.6519 Vel 2023-Feb-15 06:00 09 56 23.98 -58 34 53.2 13.314 n.a. 0.03268124332983 -8.3788113 108.5473 /L 75.6/ 32.9706 Car 2023-Feb-15 12:00 09 46 40.76 -64 32 34.2 13.431 n.a. 0.03164873449852 -5.8833971 102.6636 /T 74.9/ 30.3231 Car 2023-Feb-15 18:00 09 30 27.17 -70 45 38.9 13.597 n.a. 0.03099228003861 -3.1815383 96.4392 /T 73.6/ 27.7195 Car 2023-Feb-16 00:00 08 58 29.07 -76 59 03.0 13.818 n.a. 0.03073586915823 -0.3585959 90.0153 /T 71.7/ 25.1703 Cha 2023-Feb-16 06:00 07 35 08.96 -82 34 24.8 14.094 n.a. 0.03088940432077 2.4783138 83.5605 /T 69.3/ 22.6864 Cha 2023-Feb-16 12:00 03 41 35.28 -84 43 30.3 14.422 n.a. 0.03144687540754 5.2194341 77.2469 /T 66.5/ 20.2787 Oct 2023-Feb-16 18:00 00 50 55.64 -81 05 15.4 14.797 n.a. 0.03238747887969 7.7725757 71.2245 /T 63.4/ 17.9582 Hyi 2023-Feb-17 00:00 23 55 16.17 -75 59 53.7 15.210 n.a. 0.03367922892734 10.0763520 65.6030 /T 60.0/ 15.7362 Oct 2023-Feb-17 06:00 23 31 09.33 -70 59 35.9 15.651 n.a. 0.03528372712731 12.1029311 60.4463 /T 56.6/ 13.6237 Tuc 2023-Feb-17 12:00 23 17 59.05 -66 21 18.8 16. n.a. 0.03716067528469 13.8524234 55.7768 /T 53.1/ 11.6314 Tuc 2023-Feb-17 18:00 23 09 44.07 -62 08 46.6 17. n.a. 0.03927125741141 15.3436331 51.5857 /T 49.5/ 9.7699 Tuc 2023-Feb-18 00:00 23 04 05.66 -58 21 50.9 17. n.a. 0.04158017526763 16.6051544 47.8441 /T 46.1/ 8.0493 Tuc $$EOE ********************************************************************************************************************************* Column meaning: TIME Times PRIOR to 1962 are UT1, a mean-solar time closely related to the prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1 using integer leap-seconds for 1972 and later years. Conversion from the internal Barycentric Dynamical Time (TDB) of solar system dynamics to the non-uniform civil UT time-scale requested for output has not been determined for UTC times after the next July or January 1st. Therefore, the last known leap-second is used as a constant over future intervals. Time tags refer to the UT time-scale conversion from TDB on Earth regardless of observer location within the solar system, although clock rates may differ due to the local gravity field and no analog to "UT" may be defined for that location. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. CALENDAR SYSTEM Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15 (if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any) are in the Julian calendar system, which is automatically extended for dates prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for matching historical dates. The Gregorian calendar more accurately corresponds to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is available if such physical events are the primary interest. NOTE: "n.a." in output means quantity "not available" at the print-time. 'R.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'APmag S-brt' = The asteroids' approximate apparent airless visual magnitude and surface brightness using the standard IAU H-G system magnitude model: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi_1 + G*phi_2) For solar phase angles >90 deg, the error could exceed 1 magnitude. For phase angles >120 degrees, output values are rounded to the nearest integer to indicate error could be large and unknown. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'T-O-M/MN_Illu%' = Target-Observer-Moon LUNAR ELONGATION angle and illuminated percentage. The apparent lunar elongation angle between target body center and Moon center, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT 'Cnst' = Constellation ID; the 3-letter abbreviation for the name of the constellation containing the target centers' astrometric position, as defined by IAU (1930) boundary delineation. See documentation for list of abbreviations. Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA General site: https://ssd.jpl.nasa.gov/ Mailing list: https://ssd.jpl.nasa.gov/email_list.html System news : https://ssd.jpl.nasa.gov/horizons/news.html User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x API https://ssd-api.jpl.nasa.gov/doc/horizons.html command-line telnet ssd.jpl.nasa.gov 6775 e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov ********************************************************************************************************************************* !$$SOF COMMAND = '2005 YY128' QUANTITIES = '1,9,20,23,25,29' START_TIME = '2023-02-04' STEP_SIZE = '6 hours' STOP_TIME = '2023-02-18'