******************************************************************************* JPL/HORIZONS (2021 PH27) 2024-May-06 07:03:09 Rec #:50592772 (+COV) Soln.date: 2024-Mar-08_05:23:04 # obs: 75 (2017-2024) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2459508.5 ! 2021-Oct-21.00 (TDB) Residual RMS= .096022 EC= .7116838599306043 QR= .1331242804524797 TP= 2459495.3397388426 OM= 39.40893471852855 W= 8.573329511330847 IN= 31.92674422865617 A= .461730239661358 MA= 41.34148800026699 ADIST= .7903361988702362 PER= .31376 N= 3.141388116 ANGMOM= .008211487999999999 DAN= .13375 DDN= .76912 L= 46.7005097 B= 4.521665 MOID= .22375201 TP= 2021-Oct-07.8397388426 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 17.72 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#14, OCC=2 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Mon May 6 07:03:09 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2021 PH27) {source: JPL#14} Center body name: Sun (10) {source: DE441} Center-site name: BODYCENTRIC ******************************************************************************* Start time : A.D. 2021-Oct-07 00:00:00.0000 UT Stop time : A.D. 2021-Oct-08 00:00:00.0000 UT Step-size : 60 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -695700.0 {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 : IAU_SUN {East-longitude positive} Center radii : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : None 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.240503.p240727 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-03. PREDICTS-> 2024-JUL-26 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 n.a. , 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= 2459508.5 ! 2021-Oct-21.00 (TDB) Residual RMS= .096022 EC= .7116838599306043 QR= .1331242804524797 TP= 2459495.3397388426 OM= 39.40893471852855 W= 8.573329511330847 IN= 31.92674422865617 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.870087868012269E-01 Y=-6.978741203681178E-02 Z= 1.301749583890499E-01 VX=-2.094600442496843E-02 VY=-1.685066694067529E-02 VZ=-8.071905522058125E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 17.72 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. *************************************************************************************************** Date__(UT)__HR:MN delta deldot VmagSn VmagOb RNG_3sigma RNGRT_3sig *************************************************************************************************** $$SOE 2021-Oct-07 00:00 0.13722067862701 -16.5225068 104.9220019 104.9220019 127.2635 0.0043438 2021-Oct-07 01:00 0.13683210260693 -15.7686712 105.0968359 105.0968359 118.3243 0.0043616 2021-Oct-07 02:00 0.13646178381507 -15.0053651 105.2641095 105.2641096 109.7074 0.0043784 2021-Oct-07 03:00 0.13610994598877 -14.2329324 105.4236307 105.4236307 101.5298 0.0043940 2021-Oct-07 04:00 0.13577680432806 -13.4517383 105.5752132 105.5752133 93.9414 0.0044085 2021-Oct-07 05:00 0.13546256498982 -12.6621688 105.7186778 105.7186778 87.1317 0.0044219 2021-Oct-07 06:00 0.13516742459312 -11.8646301 105.8538520 105.8538520 81.3309 0.0044340 2021-Oct-07 07:00 0.13489156973816 -11.0595483 105.9805714 105.9805714 76.8010 0.0044449 2021-Oct-07 08:00 0.13463517654121 -10.2473682 106.0986798 106.0986798 73.8067 0.0044545 2021-Oct-07 09:00 0.13439841018821 -9.4285529 106.2080299 106.2080299 72.5648 0.0044628 2021-Oct-07 10:00 0.13418142450944 -8.6035827 106.3084840 106.3084840 73.1863 0.0044698 2021-Oct-07 11:00 0.13398436157739 -7.7729540 106.3999142 106.3999142 75.6417 0.0044754 2021-Oct-07 12:00 0.13380735133057 -6.9371784 106.4822030 106.4822030 79.7730 0.0044798 2021-Oct-07 13:00 0.13365051122515 -6.0967813 106.5552439 106.5552440 85.3434 0.0044827 2021-Oct-07 14:00 0.13351394591649 -5.2523007 106.6189417 106.6189417 92.0939 0.0044842 2021-Oct-07 15:00 0.13339774697277 -4.4042860 106.6732127 106.6732127 99.7831 0.0044844 2021-Oct-07 16:00 0.13330199262210 -3.5532960 106.7179853 106.7179853 108.2055 0.0044831 2021-Oct-07 17:00 0.13322674753504 -2.6998982 106.7532002 106.7532002 117.1950 0.0044805 2021-Oct-07 18:00 0.13317206264360 -1.8446666 106.7788105 106.7788106 126.6201 0.0044764 2021-Oct-07 19:00 0.13313797499801 -0.9881806 106.7947822 106.7947822 136.3778 0.0044709 2021-Oct-07 20:00 0.13312450766228 -0.1310229 106.8010938 106.8010938 146.3873 0.0044640 2021-Oct-07 21:00 0.13313166964888 0.7262218 106.7977371 106.7977371 156.5844 0.0044558 2021-Oct-07 22:00 0.13315945589336 1.5829685 106.7847166 106.7847166 166.9180 0.0044461 2021-Oct-07 23:00 0.13320784726878 2.4386337 106.7620498 106.7620498 177.3464 0.0044351 2021-Oct-08 00:00 0.13327681064002 3.2926369 106.7297671 106.7297671 187.8351 0.0044227 $$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. STATISTICAL UNCERTAINTIES Output includes formal +/- 3 standard-deviation statistical orbit uncertainty quantities. There is a 99.7% (1-D) or 98.9% (2-D) chance the actual value is within given bounds. These statistical calculations assume observational data errors are random. If there are systematic biases (such as timing, reduction or star-catalog errors), results can be optimistic. Because the epoch covariance is mapped using linearized variational partial derivatives, results can also be optimistic for times far from the solution epoch, particularly for objects having close planetary encounters. '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 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: KM/S 'RNG_3sigma RNGRT_3sig' = Range and range rate (radial velocity) formal 3-standard-deviation uncertainties. Units: KM, KM/S 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/hrzn_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Author : Jon.D.Giorgini@jpl.nasa.gov *************************************************************************************************** !$$SOF COMMAND = '2021 PH27' START_TIME = '2021-10-07' STOP_TIME = '2021-10-08' STEP_SIZE = '1 hour' QUANTITIES = '20,22,39' CENTER = '@Sun'