Page content updated: 2026:147:14:34:00 ( 10:34 AM Wed 27-May )

Key Snapshot and SOH Values (Δt = - 2:51)
Obsid30430
Format2_NORM
RadMonENAB
CPE StatusNORM
RA258.249
Dec64.056
Roll166.634
Pitch93.75
Sim Z92903
Sim Focus-535
HETG angle77.59
LETG angle76.09
SCS 107INAC
SCS 128ACT
SCS 129ACT
SCS 130ACT
RadMonENAB
SCS 131ACT
SCS 132ACT
SCS 133ACT
Snapshot from 2026:147:11:42:30 (Δt = - 2:51)

acePred
NOW
Cursor date
Cursor delta
Next comm
Delta
Station
Activity
ACE fluence
ACE P3 flux
HRC proxy
--- Latest values ---
ACE P3 flux
ACE 2hr avg
HRC proxy
SIM-Z
Pitch
RA
Dec
Roll
PCAD
Obsid
SI
Grating
SI mode
Power cmd
CCD, FEP
Vid, Clock

Chandra Events (Load link unavailable)
Time (UT)EventDelta timeTime (Eastern)
2026:147:09:49:55Maneuver to 258.24124 64.05989 166.641 [2026:147:10:32:45]- 4:44 5:49 AM Wed 27-May
2026:147:10:37:15Obsid: 30430 SI: ACIS-I (10 ksec) Target: Abell 2255 - 3:56 6:37 AM Wed 27-May
2026:147:11:00:00Comm pass on DSS-26 (duration 0:45)- 3:34 7:00 AM Wed 27-May
2026:147:13:23:55Maneuver to 238.95194 11.19244 188.805 [2026:147:13:47:12]- 1:10 9:23 AM Wed 27-May
2026:147:13:51:42Obsid: 30437 SI: ACIS-I (30 ksec) Target: PG 1553+113 - 0:42 9:51 AM Wed 27-May
2026:147:14:34:00--------------- NOW --------------- 0:0010:34 AM Wed 27-May
2026:147:17:45:00Comm pass on DSS-36 (duration 1:00) 3:11 1:45 PM Wed 27-May
2026:147:22:24:31Load MAY2526A:CL147:2203 [2026:149:08:16:37] 7:50 6:24 PM Wed 27-May
2026:147:22:24:31Load MAY2526A:CL147:2203 [2026:149:08:16:37] 7:50 6:24 PM Wed 27-May
2026:147:22:27:31Maneuver to 240.20000 11.85000 187.161 [2026:147:22:35:59] 7:53 6:27 PM Wed 27-May
2026:147:22:31:05Grating: HETG 7:57 6:31 PM Wed 27-May
2026:147:22:33:31RADMON Disable 7:59 6:33 PM Wed 27-May
2026:147:22:40:29ER Obsid: 41460 (3 ksec) Purpose: Perigee Attitude 8:06 6:40 PM Wed 27-May
2026:148:00:20:29Maneuver to 13.00000 47.00000 76.483 [2026:148:00:55:30] 9:46 8:20 PM Wed 27-May
2026:148:01:00:00ER Obsid: 41459 (3 ksec) Purpose: Perigee Attitude 10:26 9:00 PM Wed 27-May
2026:148:01:30:00Comm pass on DSS-54 (duration 1:00) 10:56 9:30 PM Wed 27-May
2026:148:02:16:22Maneuver to 249.10000 -18.50000 125.088 [2026:148:02:55:30] 11:4210:16 PM Wed 27-May
2026:148:03:00:00ER Obsid: 41458 (2 ksec) Purpose: Perigee Attitude 12:2611:00 PM Wed 27-May
2026:148:03:54:32Maneuver to 242.00000 -23.00000 302.343 [2026:148:04:45:30] 13:2011:54 PM Wed 27-May
2026:148:04:50:00ER Obsid: 41457 (1 ksec) Purpose: Perigee Attitude 14:1612:50 AM Thu 28-May
2026:148:05:21:41Maneuver to 135.40000 -8.60000 245.150 [2026:148:05:55:30] 14:47 1:21 AM Thu 28-May
2026:148:06:00:00ER Obsid: 41456 (3 ksec) Purpose: Perigee Attitude 15:26 2:00 AM Thu 28-May
2026:148:07:37:50Maneuver to 105.00000 -6.00000 233.960 [2026:148:07:55:30] 17:03 3:37 AM Thu 28-May
2026:148:08:00:00ER Obsid: 41455 (3 ksec) Purpose: Perigee Attitude 17:26 4:00 AM Thu 28-May
2026:148:10:00:00Comm pass on DSS-24 (duration 1:00) 19:26 6:00 AM Thu 28-May
2026:148:10:29:09Maneuver to 220.59630 -17.22749 255.735 [2026:148:11:05:14] 19:55 6:29 AM Thu 28-May
2026:148:10:29:43Grating: NONE 19:55 6:29 AM Thu 28-May
2026:148:10:51:52RADMON Enable 20:17 6:51 AM Thu 28-May
2026:148:11:09:44Obsid: 30202 SI: ACIS-S (10 ksec) Target: NGC5728 20:35 7:09 AM Thu 28-May
2026:148:13:56:24Maneuver to 135.15482 20.92101 246.000 [2026:148:14:28:00] 23:22 9:56 AM Thu 28-May
2026:148:14:32:30Obsid: 30398 SI: ACIS-S (15 ksec) Target: ZwCl 0857.9+210 23:5810:32 AM Thu 28-May
2026:148:17:15:00Comm pass on DSS-54 (duration 1:00) 1d 02:41 1:15 PM Thu 28-May
2026:148:18:42:30Maneuver to 220.59611 -17.22652 255.727 [2026:148:19:14:07] 1d 04:08 2:42 PM Thu 28-May
2026:148:19:18:37Obsid: 32361 SI: ACIS-S (10 ksec) Target: NGC5728 1d 04:44 3:18 PM Thu 28-May
2026:148:22:05:17Maneuver to 135.15480 20.92160 246.000 [2026:148:22:36:53] 1d 07:31 6:05 PM Thu 28-May
2026:148:22:41:23Obsid: 32363 SI: ACIS-S (15 ksec) Target: ZwCl 0857.9+210 1d 08:07 6:41 PM Thu 28-May
2026:149:00:55:00Comm pass on DSS-65 (duration 1:00) 1d 10:21 8:55 PM Thu 28-May
2026:149:02:51:23Maneuver to 220.59605 -17.22612 255.695 [2026:149:03:23:00] 1d 12:1710:51 PM Thu 28-May
2026:149:03:27:30Obsid: 32362 SI: ACIS-S (10 ksec) Target: NGC5728 1d 12:5311:27 PM Thu 28-May
2026:149:06:14:10Maneuver to 149.86337 30.77355 242.998 [2026:149:06:44:13] 1d 15:40 2:14 AM Fri 29-May
2026:149:06:48:43Obsid: 29860 SI: ACIS-S (20 ksec) Target: Leo A 1d 16:14 2:48 AM Fri 29-May
2026:149:12:19:03Load MAY2526A:CL149:1203 [2026:150:23:16:47] 1d 21:45 8:19 AM Fri 29-May
2026:149:12:19:03Load MAY2526A:CL149:1203 [2026:150:23:16:47] 1d 21:45 8:19 AM Fri 29-May
2026:149:12:22:03Maneuver to 202.11101 -31.57459 273.335 [2026:149:12:51:45] 1d 21:48 8:22 AM Fri 29-May
2026:149:12:56:15Obsid: 32365 SI: ACIS-I (13 ksec) Target: Abell 3558 SE 1d 22:22 8:56 AM Fri 29-May
2026:149:13:50:00Comm pass on DSS-36 (duration 1:00) 1d 23:16 9:50 AM Fri 29-May
2026:149:16:32:55Maneuver to 188.70382 15.55655 229.002 [2026:149:16:58:05] 2d 01:5812:32 PM Fri 29-May
2026:149:17:02:35Obsid: 30170 SI: ACIS-S (29 ksec) Target: NGC4540 2d 02:28 1:02 PM Fri 29-May
2026:149:18:55:00Comm pass on DSS-54 (duration 1:00) 2d 04:21 2:55 PM Fri 29-May
2026:150:01:05:55Maneuver to 304.91013 38.71925 126.875 [2026:150:01:39:41] 2d 10:31 9:05 PM Fri 29-May
2026:150:01:09:30Grating: HETG 2d 10:35 9:09 PM Fri 29-May
2026:150:01:44:11Obsid: 31523 SI: ACIS-S (32 ksec) Target: V444 Cyg 2d 11:10 9:44 PM Fri 29-May
2026:150:02:45:00Comm pass on DSS-65 (duration 0:50) 2d 12:1110:45 PM Fri 29-May
2026:150:10:00:00Comm pass on DSS-24 (duration 1:00) 2d 19:26 6:00 AM Sat 30-May
2026:150:10:37:31Maneuver to 262.67956 -21.46997 93.925 [2026:150:11:06:35] 2d 20:03 6:37 AM Sat 30-May
2026:150:10:41:05Grating: NONE 2d 20:07 6:41 AM Sat 30-May
2026:150:11:11:05Obsid: 30952 SI: ACIS-S (9 ksec) Target: Kepler's SNR 2d 20:37 7:11 AM Sat 30-May
2026:150:13:57:16Maneuver to 16.50000 13.80000 107.002 [2026:150:14:34:15] 2d 23:23 9:57 AM Sat 30-May
2026:150:14:00:50Grating: HETG 2d 23:2610:00 AM Sat 30-May
2026:150:14:02:53RADMON Disable 2d 23:2810:02 AM Sat 30-May

CXO and GOES rates
CXOGOESLimit
HRC shield018250
HRC MCP484430
P4GM---0.11300
P41GM---0.028.47
CXO: from snapshot at 2026:147:11:42:30 (- 2:51)
GOES proxies: scaled 15 min average of GOES-16
Last avgs at HRC: - 0:19   P4GM: - 0:19   P41GM: - 0:19
ACE rates
Value2hr limitOrbital limitHours to
Orbital limit
Current flux24.25000012000> 30
2hr avg flux23.75000012000> 30
Orbital fluence4.5x106---2.0x109---
ACE data from 2026:147:14:20:00 (- 0:14)
Orbital fluence: integrated attenuated ACE flux
Grating attenuation not factored into current or 2hr flux numbers
RADMON and SOT alert limits information

ACE particle rates ( MTA SWPC )

GOES particle rates

GOES proxy for HRC shield rates

3-day Solar-Geophysical Forecast
Geophysical ActivityGeophysical Activity Summary 25/2100Z to 26/2100Z: The geomagnetic field has been at quiet to unsettled levels for the past 24 hours. Solar wind speed reached a peak of 459 km/s at 26/1918Z. Total IMF reached 9 nT at 26/1838Z. The maximum southward component of Bz reached -7 nT at 26/2021Z. Protons greater than 10 MeV at geosynchronous orbit reached a peak level of 23 pfu at 26/0110Z. Electrons greater than 2 MeV at geosynchronous orbit reached a peak level of 455 pfu. IIB. Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels on days one and two (27 May, 28 May) and quiet levels on day three (29 May). Protons greater than 10 Mev have a slight chance of crossing threshold on day one (27 May).
Solar ActivityAnalysis of Solar Active Regions and Activity from 25/2100Z to 26/2100Z: Solar activity has been at low levels for the past 24 hours. There are currently 9 numbered sunspot regions on the disk. IB. Solar Activity Forecast: Solar activity is expected to be low with a chance for M-class flares on days one, two, and three (27 May, 28 May, 29 May).

Solar X-ray Activity

Solar Wind Data ( SOHO ACE )

Solar Flare Monitor