IOTA/IOTA-ES occultation update for (278) Paulina / UCAC4 433-059170 event on 2024 Dec 23, 01:35 UT Visible from Summary ------- On 2024 Dec 23 UT, the 34.75 km diameter asteroid (278) Paulina will occult a 11.5 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 3.06 mag to 14.50 mag (the magnitude of the asteroid) for at most 1.130 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: 99 * date and approx. time of event: 2024 Dec 23, 01:31 - 2024 Dec 23, 01:38 * geocentric midpoint of event [JD]: 2460667.56604558 * magnitude of target star: 11.51 * magnitude drop [mag]: 3.06 * estimated maximum duration [s]: 1.130 * Moon: 48 % sunlit, 21° distance * Sun: 67° distance * rough path description: The occultation path -------------------- * approximate projected width [km]: 35 * 1 sigma uncertainty interval [path widths]: +/- 0.17 * 1 sigma uncertainty interval [seconds]: +/- 0.8 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.011, +/- 0.006) * 1 sigma uncertainty ellipse (major, minor, PA): (0.013", 0.002", 118°) * approx speed of asteroid's shadow [km/s]: 30.6729 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of UCAC4 433-059170 by 278 Paulina on 2024 Dec 23 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 1 0 0 9 57 15 1 31 41.5 1 94 -63 9 47 40 10 6 51 9 44 30 10 10 0 .... 2 0 0 9 53 6 1 31 41.5 1 94 -62 9 43 30 10 2 41 9 40 20 10 5 51 0.13 3 0 0 9 48 34 1 31 41.7 2 94 -62 9 38 58 9 58 10 9 35 48 10 1 20 0.15 4 0 0 9 43 42 1 31 41.8 3 94 -61 9 34 5 9 53 17 9 30 55 9 56 28 0.16 5 0 0 9 38 27 1 31 42.1 4 94 -60 9 28 51 9 48 3 9 25 40 9 51 14 0.16 6 0 0 9 32 51 1 31 42.4 5 95 -59 9 23 15 9 42 28 9 20 4 9 45 38 0.17 7 0 0 9 26 54 1 31 42.8 6 95 -58 9 17 17 9 36 31 9 14 6 9 39 42 0.17 8 0 0 9 20 35 1 31 43.2 7 95 -57 9 10 58 9 30 13 9 7 47 9 33 23 0.17 9 0 0 9 13 55 1 31 43.7 8 95 -56 9 4 18 9 23 33 9 1 7 9 26 44 0.17 10 0 0 9 6 54 1 31 44.3 9 95 -55 8 57 16 9 16 32 8 54 5 9 19 43 0.17 11 0 0 8 59 32 1 31 44.9 10 95 -54 8 49 53 9 9 10 8 46 42 9 12 21 0.17 12 0 0 8 51 48 1 31 45.6 11 96 -53 8 42 9 9 1 27 8 38 57 9 4 38 0.17 13 0 0 8 43 43 1 31 46.4 12 96 -52 8 34 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180 0 0 -29 43 47 1 38 31.0 0 266 67 -29 53 22 -29 34 13 -29 56 32 -29 31 3 0.81 Uncertainty in time = +/- 1 secs Prediction of 2023 Jul 15.8 Data for the target star ------------------------ * name: UCAC4 433-059170 * constellation : Virgo * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 13 38 10.6527 DE: -03 28 17.675 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 13 38 10.6528 DE: -03 28 17.675 * position source: Gaia DR3 * standard error: RA,DE [mas]: (0.300,0.200) * V mag [mag]: 11.5 * B mag [mag]: 11.8 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (278) Paulina asteroid class: approx. diameter [km]: 35 approx. diameter ["]: 0.018 distance from Earth [AU]: 2.60200 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#62 date of fit: 2023 Apr 24 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): 0.013", 0.002", 118.111° remarks: * orbital elements for (278)Paulina : Mean anomaly = 343.0739561782 deg Arg. of pericenter = 142.0105138018 deg Long. of node = 61.6869196412 deg Inclination = 7.8351299524 deg Eccentricity = 0.1346552142 Semimajor axis = 2.7533691074 AU Perihelion dist = 2.3826136004 AU Mag: H = 9.45, G = 0.15 Epoch of elements : MJD 60667.06604550 TDT (2024 Dec 23.0660) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#622023Apr24,1.13,2024,12,23,1.585094,-0.057670,-0.160745,16.291591,-5.857648,-0.004888,0.002170,-0.000001,0.000000 88.9953,-3.5986,156.00,-23.43,False UCAC4 433-059170,13.63629237,-3.4715761,11.84,11.51,11.33,0.0,0,,13.65769602,-3.5985889,3.06,2.80,0,0,0 278,Paulina,14.50,34.750,2.6020,0,0,3.678,-19.80,,2.0,0 0,342.8440,2024,12,22,142.0105,61.6869,7.8351,0.13466,2.75337,2.38261,9.45,5.0,0.15 1.165,0.0127,0.0025,118,0.0030,Known errors,1.33,0,-1,-1 20241223_059170,60140.75 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2023 Jul 15, 18:02 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org