IOTA/IOTA-ES occultation update for (8027) Robertrushworth / TYC 6144-00312-1 event on 2024 Jan 17, 01:39 UT Visible from Summary ------- On 2024 Jan 17 UT, the 20.966 km diameter asteroid (8027) Robertrushworth will occult a 11.0 mag star in the constellation Virgo for observers along a path across . In the case of an occultation, the combined light of the asteroid and the star will drop by 7.30 mag to 18.30 mag (the magnitude of the asteroid) for at most 0.980 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 95 * date and approx. time of event: 2024 Jan 17, 01:35 - 2024 Jan 17, 01:43 * geocentric midpoint of event [JD]: 2460326.56898909 * magnitude of target star: 11.00 * magnitude drop [mag]: 7.30 * estimated maximum duration [s]: 0.980 * Moon: 37 % sunlit, 156° distance * Sun: 82° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 26 * 1 sigma uncertainty interval [path widths]: +/- 0.44 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.023, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.023", 0.001", 105°) * approx speed of asteroid's shadow [km/s]: 21.3368 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6144-00312-1 by 8027 Robertrushworth on 2024 Jan 17 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude - 23 0 0 -10 40 13 1 35 19.2 1 109 -58 -10 47 46 -10 32 42 -10 54 23 -10 26 7 .... - 22 0 0 -11 2 21 1 35 19.4 2 109 -58 -11 9 55 -10 54 48 -11 16 34 -10 48 11 0.61 - 21 0 0 -11 25 8 1 35 19.7 3 109 -58 -11 32 44 -11 17 33 -11 39 24 -11 10 55 0.66 - 20 0 0 -11 48 35 1 35 20.1 4 109 -57 -11 56 13 -11 40 58 -12 2 55 -11 34 18 0.68 - 19 0 0 -12 12 42 1 35 20.7 5 109 -57 -12 20 21 -12 5 3 -12 27 5 -11 58 21 0.69 - 18 0 0 -12 37 27 1 35 21.3 6 108 -56 -12 45 9 -12 29 46 -12 51 54 -12 23 3 0.70 - 17 0 0 -13 2 52 1 35 22.1 7 108 -56 -13 10 36 -12 55 9 -13 17 23 -12 48 24 0.71 - 16 0 0 -13 28 56 1 35 23.1 8 108 -55 -13 36 42 -13 21 11 -13 43 31 -13 14 24 0.71 - 15 0 0 -13 55 38 1 35 24.1 9 108 -55 -14 3 26 -13 47 51 -14 10 17 -13 41 2 0.71 - 14 0 0 -14 22 58 1 35 25.3 10 107 -54 -14 30 49 -14 15 9 -14 37 41 -14 8 19 0.72 - 13 0 0 -14 50 57 1 35 26.7 11 107 -53 -14 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21.4 2 236 48 -57 20 0 -57 2 47 -57 27 35 -56 55 15 0.96 -173 0 0 -56 48 7 1 43 21.5 1 236 48 -56 56 46 -56 39 28 -57 4 23 -56 31 55 1.08 -172 0 0 -56 24 18 1 43 21.6 1 235 48 -56 33 0 -56 15 37 -56 40 38 -56 8 2 1.45 -171 0 0 .. .. .... .. .. .. .. .. .. -56 8 41 .. .. .. -56 16 21 .. .. .. .... Uncertainty in time = +/- 2 secs Prediction of 2023 Jul 12.0 Data for the target star ------------------------ * name: TYC 6144-00312-1 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 57 10.3461 DE: -19 11 59.912 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 57 10.3463 DE: -19 11 59.913 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.200,0.200) * V mag [mag]: 11.0 * B mag [mag]: 11.3 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (8027) Robertrushworth asteroid class: approx. diameter [km]: 21 approx. diameter ["]: 0.009 distance from Earth [AU]: 3.04380 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#54 date of fit: 2023 Apr 25 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.023", 0.001", 104.962° remarks: * orbital elements for (8027)Robertrushworth : Mean anomaly = 293.1362486784 deg Arg. of pericenter = 23.9827903173 deg Long. of node = 256.2976046364 deg Inclination = 7.6722103438 deg Eccentricity = 0.1627646759 Semimajor axis = 3.1954226584 AU Perihelion dist = 2.6753207251 AU Mag: H = 12.50, G = 0.15 Epoch of elements : MJD 60326.06898896 TDT (2024 Jan 17.0690) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#542023Apr25,0.98,2024,1,17,1.655738,-0.250459,-0.532555,10.902676,-5.115432,-0.005636,0.001995,0.000000,0.000000 68.7958,-19.3163,157.61,-20.87,False TYC 6144-00312-1,13.95287390,-19.1999753,11.26,11.00,10.86,0.0,0,,13.97477349,-19.3162929,7.31,7.00,0,0,0 8027,Robertrushworth,18.30,20.966,3.0438,0,0,2.226,-14.78,,1.2,0 0,292.9518,2024,1,16,23.9828,256.2976,7.6722,0.16276,3.19542,2.67532,12.50,5.0,0.15 1.438,0.0233,0.0007,105,0.0042,Known errors,1.12,0,-1,-1 20240117_0312-1,60137.02 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 12, 00:25 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org