17872( 9) - 15-Aug-2025 18:34:51 - [ 1] HUBBLE SPACE TELESCOPE OBSERVING PROGRAM 17872 Version: 9 Check-in Time: 15-Aug-2025 18:34:51 STScI Edit Number: 6 Title JOINING JUNO'S LAST ORBITS: A MULTI-WAVELENGTH PERSPECTIVE ------------------------------------------------------------------------------------ Type Cycle GO 32 ------------------------------------------------------------------------------------ Investigators Contact? PI: Mr. Sean McEntee Dublin Institute For Advanced Studies Y CoI: Dr. Matthew J. Rutala Dublin Institute For Advanced Studies N CoI: Dr. Caitriona M. Jackman Dublin Institute For Advanced Studies N CoI: Dr. William Dunn University College London N CoI: Affelia Wibisono Dublin Institute For Advanced Studies N CoI: Mr. Dale Weigt University of Southampton N CoI: Bryn Parry University College London N CoI: Dr. Ralph Kraft Smithsonian Institution Astrophysical N Observatory ------------------------------------------------------------------------------------ Abstract X-ray (<60 Angstrom) and UV (>700 Angstrom) observations by Chandra and HST have continuously revolutionised our understanding of Jupiter. In September 2021, the first ever EUV (60-170 Angstrom) observation of Jupiter was taken by the HRC-S thin filter, revealing an order of magnitude increase in counts compared to previous observations. A simultaneous HST observation mainly focused on Jupiter's disk emission. This campaign will conduct new EUV observations of Jupiter's auroral region coinciding with the final orbits of the Juno spacecraft's mission, supplemented by simultaneous HST observations optimised for auroral viewing. This is the final opportunity of this decade to unveil the physics of Jupiter's dynamic X-ray emission in concert with in situ exploration of Jupiter's magnetosphere. ------------------------------------------------------------------------------------ Observations Description ------------------------ One HST/STIS FUV-MAMA CLEAR filter imaging observation over one science orbit will be taken during each of the Chandra HRC-S observations, with four observations in total. All observations will have 2.5 ks exposure time and be completed in TIMETAG mode, allowing for retrieval of temporal variability during reduction. These observations will provide simultaneous FUV imaging to be compared to the EUV Chandra observation. During PJ 76 (2025-09-14), the Sun-HST-Jupiter angle will be 61 degrees, larger than the 50 degrees minimum acceptable for telescope pointing. This is also true for PJ69 and PJ70 (listed in Table 1). Optimal viewing is obtained with a pointing of 13" towards Jovian North from the centre of the planet as it appears on the sky; these sky coordinates can be determined from ephemerides once the date and time of the observation are known. Given Jupiter's apparent size (35") and the STIS FOV (25"), this will capture nearly the full northern aurorae, as well as low-latitude emission (for calibration against Chandra) and sky background (for calibration against geocoronal H). For these imaging observations, any roll angle is acceptable given reasonably accurate pointing 17872( 9) - 15-Aug-2025 18:34:51 - [ 2] (i.e., ~ 1" accuracy or better, which HST is fully capable of), and so the roll angle constraints due to the separation angle (i.e., +U3 limited to 15-30 off nominal) are acceptable. ------------------------------------------------------------------------------------ 17872( 9) - 15-Aug-2025 18:34:51 - [ 3] TARGET LIST Solar System Targets ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 1 TARGET NAME: JUPITER-NORTH-AURORA ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: OFFSET OFFSET JUPITER ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER TYPE=PGRAPHIC, LONG=170, LAT=65 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF JUPITER-NORTH-AURORA BY JUPITER FROM EARTH, CML OF JUPITER FROM EARTH BETWEEN 110 220 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = -2.4 +/- 0.5 Level 2 Planetographics reference to Jupiter System 3 (West) Ephemeris Center: EARTH Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ TARGET NUMBER: 2 TARGET NAME: JUPITER-NORTH-AURORA2 ------------------------------------------------------------------------------------------------------------------------------------ TARGET DESCRIPTION: OFFSET OFFSET JUPITER ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 1 TARGET POSITION LEVEL 2 STD=JUPITER TYPE=PGRAPHIC, LONG=170, LAT=65 ------------------------------------------------------------------------------------------------------------------------------------ TARGET POSITION LEVEL 3 WINDOWS NOT OCC OF JUPITER-NORTH-AURORA2 BY JUPITER FROM EARTH, CML OF JUPITER FROM EARTH BETWEEN 110 240 ------------------------------------------------------------------------------------------------------------------------------------ DATA COMMENTS V = -2.4 +/- 0.5 Level 2 Planetographics reference to Jupiter System 3 (West) Target for visit 2. CML ranged opened to 110 to 240 Ephemeris Center: EARTH degrees. Extended: YES ------------------------------------------------------------------------------------------------------------------------------------ 17872( 9) - 15-Aug-2025 18:34:51 - [ 4] Visit: 01 (JUPITER-NORTH-AURORA) Visit Requirements: SCHED 100%; BETWEEN 2025.258:15:46:00 AND 2025.258:16:46:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 JUPITER-NOR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2400 S TH-AURORA -MAMA G see below (1998 S) Comments: ETC run not provided as similar filter/aperture observations have been conducted previously This observation is to be co-ordinated with Chandra HRC observations of Jupiter, and exact dates will be confirmed at a later date. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ JUPITER-NORTH-AUROR 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 1998.0 S A -MAMA G 17872( 9) - 15-Aug-2025 18:34:51 - [ 5] Visit: 02 (JUPITER-NORTH-AURORA) Visit Requirements: SCHED 100%; BETWEEN 2025.258:17:20:00 AND 2025.258:18:20:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 JUPITER-NOR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2400 S TH-AURORA2 -MAMA G see below (1998 S) Comments: ETC run not provided as similar filter/aperture observations have been conducted previously This observation is to be co-ordinated with Chandra HRC observations of Jupiter, and exact dates will be confirmed at a later date. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ JUPITER-NORTH-AUROR 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 1998.0 S A2 -MAMA G 17872( 9) - 15-Aug-2025 18:34:51 - [ 6] Visit: 03 (JUPITER-NORTH-AURORA) Visit Requirements: SCHED 100%; BETWEEN 2025.257:19:21:00 AND 2025.257:20:21:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 JUPITER-NOR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2400 S GS ACQ SCENARIO ONEB1OR TH-AURORA -MAMA G see below (1998 S) Comments: ETC run not provided as similar filter/aperture observations have been conducted previously This observation is to be co-ordinated with Chandra HRC observations of Jupiter, and exact dates will be confirmed at a later date. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ JUPITER-NORTH-AUROR 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 1998.0 S A -MAMA G 17872( 9) - 15-Aug-2025 18:34:51 - [ 7] Visit: 04 (JUPITER-NORTH-AURORA) Visit Requirements: SCHED 100%; BETWEEN 2025.257:20:56:00 AND 2025.257:21:56:00 On Hold Comments: Additional Comments: Exposures ------------------------------------------------------------------------------------------------------------------------------------ Exp | Target | Instr | Oper. | Aper |Spectral|Central| Optional |Num| Time | Special Num | Name | Config | Mode | or FOV |Element |Waveln.| Parameters |Exp| (Total) | Requirements ------------------------------------------------------------------------------------------------------------------------------------ 1 JUPITER-NOR STIS/FUV TIME-TA F25SRF2 MIRROR BUFFER-TIME=99 1 2400 S GS ACQ SCENARIO ONEB1OR TH-AURORA -MAMA G see below (1998 S) Comments: ETC run not provided as similar filter/aperture observations have been conducted previously This observation is to be co-ordinated with Chandra HRC observations of Jupiter, and exact dates will be confirmed at a later date. ------------------------------------------------------------------------------------------------------------------------------------ Sub Exposures ------------------------------------------------------------------------------------------------------------------------------------ Target | Exp |Instr | Oper. | Aper |Spectral|Cent.|Primary |Secondary |Iteration |CR-SPLIT |Orbit |Duration Name | Num |Config | Mode | or FOV |Element |Wave.|Pattern Pos |Pattern Pos |Num |Num |Number | ------------------------------------------------------------------------------------------------------------------------------------ JUPITER-NORTH-AUROR 1 STIS/FUV TIME-TA F25SRF2 MIRROR none none none none 1 1998.0 S A -MAMA G 17872( 9) - 15-Aug-2025 18:34:51 - [ 8] Summary Form for Proposal 17872 Item Used in this proposal ------------------------------------------------------------------------------------------------------------------------------------ Apertures F25SRF2 ------------------------------------------------------------------------------------------------------------------------------------ Configurations STIS/FUV-MAMA ------------------------------------------------------------------------------------------------------------------------------------ Opmodes TIME-TAG ------------------------------------------------------------------------------------------------------------------------------------ Optional Parameters BUFFER-TIME=99 ------------------------------------------------------------------------------------------------------------------------------------ Special Requirements BETWEEN 2025.257:19:21:00 AND 2025.257:20:21:00, BETWEEN 2025.257:20:56:00 AND 2025.257:21:56:00, BETWEEN 2025.258:15:46:00 AND 2025.258:16:46:00, BETWEEN 2025.258:17:20:00 AND 2025.258:18:20:00, GS ACQ SCENARIO ONEB1OR, SCHED 100% ------------------------------------------------------------------------------------------------------------------------------------ Spectral Elements MIRROR ------------------------------------------------------------------------------------------------------------------------------------ Target Names JUPITER-NORTH-AURORA, JUPITER-NORTH-AURORA2 ------------------------------------------------------------------------------------------------------------------------------------