SeeSat-L Sep-23: by thread

STARLINK OBS JAY RESPLER via Seesat-l (Fri Sep 01 2023 - 02:16:23 UTC)
2023SEP1.OBS Russell Eberst via Seesat-l (Fri Sep 01 2023 - 07:57:50 UTC)
CB Obs August 27/28, 28/29, 30/31 and August 31/September 1, 2023: Fixed video observations C. Bassa via Seesat-l (Fri Sep 01 2023 - 16:39:10 UTC)
CB Obs August 27/28, 28/29, 30/31 and August 31/September 1, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Fri Sep 01 2023 - 16:39:38 UTC)
4541 SATOBS 01 SEP 2023, Ofeq 10. alberto.rango––– via Seesat–l (Sat Sep 02 2023 - 12:37:57 UTC)
OT: Starlink train with volcano in the foreground ? satcom ops H via Seesat-l (Sat Sep 02 2023 - 13:06:51 UTC)
EV Obs 2023-09-01/02 E. Visser via Seesat-l (Sat Sep 02 2023 - 14:05:55 UTC)
- Starlink 6-xx second stage propellant ventings visible in southwestern USA states ronlee––– via Seesat–l (Sat Sep 02 2023 - 18:45:55 UTC)
  - Possible Starlink 6-12 second stage propellant venting visible in California 9:15 PM PDT ronlee––– via Seesat–l (Mon Sep 04 2023 - 03:32:55 UTC)
    - Re: Possible Starlink 6-12 second stage propellant venting visible in California 9:15 PM PDT Zhuo-xiao Wang via Seesat-l (Mon Sep 04 2023 - 07:12:23 UTC)
TS Obs 2023-09-01/02 Tomi Simola via Seesat-l (Sat Sep 02 2023 - 17:56:01 UTC)
Pacific haz ops warning. Vendenberg satcom ops H via Seesat-l (Sat Sep 02 2023 - 18:38:26 UTC)
SDA Tranche 0B objects seen Marco Langbroek via Seesat-l (Sat Sep 02 2023 - 19:34:33 UTC)
STARLINK OBS JAY RESPLER via Seesat-l (Sat Sep 02 2023 - 22:17:19 UTC)
EV Obs 2023-09-02/03 E. Visser via Seesat-l (Sun Sep 03 2023 - 07:06:27 UTC)
TS Obs 2023-09-02/03 Tomi Simola via Seesat-l (Sun Sep 03 2023 - 08:43:56 UTC)
DMB Obs Sep 2 David Brierley via Seesat-l (Sun Sep 03 2023 - 11:39:50 UTC)
Observation of Starlink-G6-13 stack (wrong string) Филипп Романов астрономия Filipp Romanov astronomy via S (Sun Sep 03 2023 - 16:58:38 UTC)
STARLINK OBS JAY RESPLER via Seesat-l (Sun Sep 03 2023 - 18:56:45 UTC)
CB Obs September 1/2, 2/3 and 3/4, 2023: Fixed video observations C. Bassa via Seesat-l (Mon Sep 04 2023 - 09:26:18 UTC)
CB Obs September 1/2, 2/3 and 3/4, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Mon Sep 04 2023 - 09:26:43 UTC)
2023SEP3-4.OBS Russell Eberst via Seesat-l (Mon Sep 04 2023 - 10:12:15 UTC)
SATOBS ML (4353), 3 Sept 2023: USA 310 Marco Langbroek via Seesat-l (Mon Sep 04 2023 - 10:28:00 UTC)
4541 SATOBS 02 SEP 2023, Ofeq 10, USA 245. alberto.rango––– via Seesat–l (Mon Sep 04 2023 - 14:34:39 UTC)
DMB Obs Sep 3 David Brierley via Seesat-l (Mon Sep 04 2023 - 14:40:59 UTC)
EV Obs 2023-09-03/04 E. Visser via Seesat-l (Mon Sep 04 2023 - 16:46:23 UTC)
TS Obs 2023-09-03/04 Tomi Simola via Seesat-l (Mon Sep 04 2023 - 17:30:25 UTC)
LB Obs 2023 Sep 04-05 Leo Barhorst via Seesat-l (Tue Sep 05 2023 - 05:52:19 UTC)
DMB Obs Sep 4 David Brierley via Seesat-l (Tue Sep 05 2023 - 08:19:51 UTC)
2023SEP4.OBS Russell Eberst via Seesat-l (Tue Sep 05 2023 - 08:25:20 UTC)
4541 SATOBS 04 SEP 2023, Ofeq 10. alberto.rango––– via Seesat–l (Tue Sep 05 2023 - 12:09:31 UTC)
EV Obs 2023-09-04/05 E. Visser via Seesat-l (Tue Sep 05 2023 - 16:31:33 UTC)
Re: SATOBS ML (4353), 27 Aug 2023 (Pt I): USA 310 Scott Tilley via Seesat-l (Wed Sep 06 2023 - 01:44:46 UTC)
LB Obs 2023 Sep 05-06 Leo Barhorst via Seesat-l (Wed Sep 06 2023 - 05:57:26 UTC)
Re: Silent Barker ? Nav warning update. satcom ops H via Seesat-l (Wed Sep 06 2023 - 06:22:39 UTC)
CB Obs September 5/6, 2023: Fixed video observations C. Bassa via Seesat-l (Wed Sep 06 2023 - 06:50:50 UTC)
CB Obs September 5/6, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Wed Sep 06 2023 - 06:51:14 UTC)
SATOBS ML (4353), 3 Sep 2023 (Pt II): GEO objects Marco Langbroek via Seesat-l (Wed Sep 06 2023 - 08:59:15 UTC)
DMB Obs Sep 5 David Brierley via Seesat-l (Wed Sep 06 2023 - 11:48:45 UTC)
TS Obs 2023-09-05/06 Tomi Simola via Seesat-l (Wed Sep 06 2023 - 14:40:00 UTC)
EV Obs 2023-09-05/06 E. Visser via Seesat-l (Wed Sep 06 2023 - 16:44:14 UTC)
Florida Nav warning satcom ops H via Seesat-l (Wed Sep 06 2023 - 20:10:14 UTC)
- Re: Florida Nav warning Marco Langbroek via Seesat-l (Wed Sep 06 2023 - 21:52:44 UTC)
  - Re: Florida Nav warning satcom ops H via Seesat-l (Thu Sep 07 2023 - 05:35:03 UTC)
    - Re: Florida Nav warning satcom ops H via Seesat-l (Thu Sep 07 2023 - 05:37:50 UTC)
Incoming....Debris warning Hawaii satcom ops H via Seesat-l (Wed Sep 06 2023 - 20:13:45 UTC)
- Re: Incoming....Debris warning Hawaii Marco Langbroek via Seesat-l (Wed Sep 06 2023 - 21:50:44 UTC)
  - Re: Incoming....Debris warning Hawaii satcom ops H via Seesat-l (Thu Sep 07 2023 - 05:30:02 UTC)
LB Obs 2023 Sep 06-07 Leo Barhorst via Seesat-l (Thu Sep 07 2023 - 08:01:07 UTC)
2023SEP6.OBS Russell Eberst via Seesat-l (Thu Sep 07 2023 - 09:25:01 UTC)
Japan's new XRISM X-ray satellite Paul Sventek via Seesat-l (Thu Sep 07 2023 - 12:00:14 UTC)
4541 SATOBS 05 SEP 2023, Ofeq 10. alberto.rango––– via Seesat–l (Thu Sep 07 2023 - 12:22:26 UTC)
TS Obs 2023-09-06/07 Tomi Simola via Seesat-l (Thu Sep 07 2023 - 15:08:57 UTC)
EV Obs 2023-09-06/07 E. Visser via Seesat-l (Thu Sep 07 2023 - 16:31:17 UTC)
LB Obs 2023 Sep 07-08 Leo Barhorst via Seesat-l (Fri Sep 08 2023 - 07:26:47 UTC)
CB Obs September 6/7 and 7/8, 2023: Fixed video observations C. Bassa via Seesat-l (Fri Sep 08 2023 - 08:45:44 UTC)
CB Obs September 6/7 and 7/8, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Fri Sep 08 2023 - 08:46:27 UTC)
Japan's XRISM and SLIM 7 September launch Paul Sventek via Seesat-l (Fri Sep 08 2023 - 11:25:04 UTC)
- Re: Japan's XRISM and SLIM 7 September launch Jonathan McDowell via Seesat-l (Fri Sep 08 2023 - 12:56:20 UTC)
4541 SATOBS 07 SEP 2023. USA 186, USA 245- alberto.rango––– via Seesat–l (Fri Sep 08 2023 - 12:38:50 UTC)
EV Obs 2023-09-07/08 E. Visser via Seesat-l (Fri Sep 08 2023 - 13:43:13 UTC)
SATOBS ML (4353), 5 Sept 2023 (Pt I): Trumpet 2 recovered Marco Langbroek via Seesat-l (Fri Sep 08 2023 - 16:16:04 UTC)
Recent unknowns... decaying Molniya object? C. Bassa via Seesat-l (Fri Sep 08 2023 - 19:35:44 UTC)
- Re: Recent unknowns... decaying Molniya object? C. Bassa via Seesat-l (Mon Sep 11 2023 - 19:38:11 UTC)
SATOBS ML (4353), 5 Sept 2023 (Pt II): HEO Marco Langbroek via Seesat-l (Fri Sep 08 2023 - 22:28:50 UTC)
EV Obs 2023-09-08/09 E. Visser via Seesat-l (Sat Sep 09 2023 - 06:21:44 UTC)
LB Obs 2023 Sep 08-09 Leo Barhorst via Seesat-l (Sat Sep 09 2023 - 07:54:46 UTC)
TS Obs 2023-09-08/09 Tomi Simola via Seesat-l (Sat Sep 09 2023 - 08:16:39 UTC)
2023SEP8.OBS Russell Eberst via Seesat-l (Sat Sep 09 2023 - 08:57:32 UTC)
CB Obs September 8/9, 2023: Fixed video observations C. Bassa via Seesat-l (Sat Sep 09 2023 - 09:30:02 UTC)
CB Obs September 8/9, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Sat Sep 09 2023 - 09:30:27 UTC)
SATOBS ML (4353), 5 Sept 2023: UNID in GEO Marco Langbroek via Seesat-l (Sat Sep 09 2023 - 13:56:54 UTC)
SATOBS ML (4353), 5 Sept 2023 (Pt III): GEO Marco Langbroek via Seesat-l (Sat Sep 09 2023 - 15:26:27 UTC)
SATOBS ML (4353), 6 Sept 2023: HEO Marco Langbroek via Seesat-l (Sat Sep 09 2023 - 16:37:21 UTC)
EV Obs 2023-09-09/10 E. Visser via Seesat-l (Sun Sep 10 2023 - 06:05:26 UTC)
TS Obs 2023-09-09/10 Tomi Simola via Seesat-l (Sun Sep 10 2023 - 07:32:00 UTC)
LB Obs 2023 Sep 09-10 Leo Barhorst via Seesat-l (Sun Sep 10 2023 - 08:20:49 UTC)
DMB Obs Sep 9 David Brierley via Seesat-l (Sun Sep 10 2023 - 08:27:42 UTC)
2023SEP9-10.OBS Russell Eberst via Seesat-l (Sun Sep 10 2023 - 08:43:05 UTC)
DMB Obs Sep 9 with corrected times David Brierley via Seesat-l (Sun Sep 10 2023 - 08:54:31 UTC)
SATOBS ML (4353), 9 Sept 2023: Trumpet 2 Marco Langbroek via Seesat-l (Sun Sep 10 2023 - 11:42:06 UTC)
CB Obs September 9/10, 2023: Fixed video observations C. Bassa via Seesat-l (Sun Sep 10 2023 - 15:46:17 UTC)
CB Obs September 9/10, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Sun Sep 10 2023 - 15:46:36 UTC)
CB Obs September 8 and 9, 2023: CMOS Video Observations C. Bassa via Seesat-l (Sun Sep 10 2023 - 15:58:11 UTC)
LB Obs 2023 Sep 10-11 Leo Barhorst via Seesat-l (Mon Sep 11 2023 - 07:00:41 UTC)
Japanese X-Ray satellite XRISM Paul Sventek via Seesat-l (Mon Sep 11 2023 - 15:17:57 UTC)
SATOBS ML (4353), 10 Sept 2023: GEO Marco Langbroek via Seesat-l (Mon Sep 11 2023 - 15:33:25 UTC)
SATOBS ML (4353), 7 Sept 2023: USA 310 Marco Langbroek via Seesat-l (Mon Sep 11 2023 - 15:44:41 UTC)
EV Obs 2023-09-10/11 E. Visser via Seesat-l (Mon Sep 11 2023 - 16:52:16 UTC)
CB Obs September 10/11, 2023: Fixed video observations C. Bassa via Seesat-l (Mon Sep 11 2023 - 19:07:13 UTC)
CB Obs September 10/11, 2023: Fixed CMOS observations C. Bassa via Seesat-l (Mon Sep 11 2023 - 19:07:41 UTC)
DMB Obs Sep 11 David Brierley via Seesat-l (Tue Sep 12 2023 - 08:07:54 UTC)
2023SEP11.OBS Russell Eberst via Seesat-l (Tue Sep 12 2023 - 08:24:10 UTC)
TS Obs 2023-09-11/12 Tomi Simola via Seesat-l (Tue Sep 12 2023 - 13:18:40 UTC)
EV Obs 2023-09-11/12 E. Visser via Seesat-l (Tue Sep 12 2023 - 16:20:05 UTC)
STARLINK OBS JAY RESPLER via Seesat-l (Wed Sep 13 2023 - 03:46:44 UTC)
SATOBS ML (4353),9 Sept 2023: GEO Marco Langbroek via Seesat-l (Wed Sep 13 2023 - 17:16:40 UTC)
LB Obs 2023 Sep 13-14 Leo Barhorst via Seesat-l (Thu Sep 14 2023 - 06:13:33 UTC)
2023SEP14.OBS Russell Eberst via Seesat-l (Thu Sep 14 2023 - 08:26:15 UTC)
Eastern North Pacific Nav Warning satcom ops H via Seesat-l (Thu Sep 14 2023 - 15:43:43 UTC)
Upcoming New Zealand launch and debris zones satcom ops H via Seesat-l (Thu Sep 14 2023 - 15:49:30 UTC)
EV Obs 2023-09-13/14 E. Visser via Seesat-l (Thu Sep 14 2023 - 16:44:29 UTC)
Orbit estimate for VICTUS NOX launch tonight Marco Langbroek via Seesat-l (Thu Sep 14 2023 - 17:41:01 UTC)
- Re: Orbit estimate for VICTUS NOX launch tonight satcom ops H via Seesat-l (Thu Sep 14 2023 - 19:09:09 UTC)
- Re: Orbit estimate for VICTUS NOX launch tonight Marco Langbroek via Seesat-l (Fri Sep 15 2023 - 07:53:44 UTC)
  - Re: Orbit estimate for VICTUS NOX launch tonight Marco Langbroek via Seesat-l (Fri Sep 15 2023 - 09:17:38 UTC)
keep a eye on the sky if your north/south america = satellite decay info Kevin Fetter via Seesat-l (Thu Sep 14 2023 - 23:26:42 UTC)
LB Obs 2023 Sep 14-15 Leo Barhorst via Seesat-l (Fri Sep 15 2023 - 07:02:24 UTC)
EV Obs 2023-09-14/15 E. Visser via Seesat-l (Fri Sep 15 2023 - 11:16:27 UTC)
SATOBS ML (4353), 10 Sep 2023: GEO Marco Langbroek via Seesat-l (Fri Sep 15 2023 - 12:52:26 UTC)
SATOBS ML (4353), 14 Sep 2023: Trumpet 2 Marco Langbroek via Seesat-l (Fri Sep 15 2023 - 14:38:44 UTC)
TS Obs 2023-09-14/15 Tomi Simola via Seesat-l (Fri Sep 15 2023 - 16:38:11 UTC)
STARLINK, ONEWEB OBS JAY RESPLER via Seesat-l (Fri Sep 15 2023 - 22:10:53 UTC)
LB Obs 2023 Sep 15-16 Leo Barhorst via Seesat-l (Sat Sep 16 2023 - 07:27:20 UTC)
TS Obs 2023-09-15/16 Tomi Simola via Seesat-l (Sat Sep 16 2023 - 07:38:34 UTC)
DMB Obs Sep 15 David Brierley via Seesat-l (Sat Sep 16 2023 - 09:37:20 UTC)
EV Obs 2023-09-15/16 E. Visser via Seesat-l (Sat Sep 16 2023 - 09:36:47 UTC)
mystery solved = Aug 6 unid slow moving sat was 41590 Kevin Fetter via Seesat-l (Sat Sep 16 2023 - 09:55:43 UTC)
SATOBS ML (4353), 15 Sept 2023: PAN is on the move again Marco Langbroek via Seesat-l (Sat Sep 16 2023 - 15:46:52 UTC)
STARLINK, ONEWEB OBS JAY RESPLER via Seesat-l (Sat Sep 16 2023 - 22:34:49 UTC)
TS Obs 2023-09-16/17 Tomi Simola via Seesat-l (Sun Sep 17 2023 - 06:26:33 UTC)
2023SEP16.OBS Russell Eberst via Seesat-l (Sun Sep 17 2023 - 09:15:29 UTC)
EV Obs 2023-09-16/17 E. Visser via Seesat-l (Sun Sep 17 2023 - 11:41:54 UTC)
SATOBS ML (4353), 15 Sep 2023 (Pt II): GEO Marco Langbroek via Seesat-l (Sun Sep 17 2023 - 12:19:52 UTC)
STARLINK OBS JAY RESPLER via Seesat-l (Sun Sep 17 2023 - 22:23:59 UTC)
LB Obs 2023 Sep 17-18 Leo Barhorst via Seesat-l (Mon Sep 18 2023 - 07:02:52 UTC)
TS Obs 2023-09-17/18 Tomi Simola via Seesat-l (Mon Sep 18 2023 - 13:46:34 UTC)
EV Obs 2023-09-17/18 E. Visser via Seesat-l (Mon Sep 18 2023 - 16:30:11 UTC)
- Re: EV Obs 2023-09-17/18 E. Visser via Seesat-l (Mon Sep 18 2023 - 18:45:52 UTC)
LB Obs 2023 Sep 19 am Leo Barhorst via Seesat-l (Tue Sep 19 2023 - 06:25:00 UTC)
2023SEP18.OBS Russell Eberst via Seesat-l (Tue Sep 19 2023 - 08:58:59 UTC)
Rocketlab lost one. Mark Robinson via Seesat-l (Tue Sep 19 2023 - 09:39:43 UTC)
TS Obs 2023-09-18/19 Tomi Simola via Seesat-l (Tue Sep 19 2023 - 12:29:37 UTC)
LB Obs 2023 Sep 20-21 Leo Barhorst via Seesat-l (Thu Sep 21 2023 - 06:42:11 UTC)
2023SEP20.OBS Russell Eberst via Seesat-l (Thu Sep 21 2023 - 09:29:40 UTC)
SATOBS ML (4353), 20 Sep 2023: PAN, Sicral 2: Marco Langbroek via Seesat-l (Thu Sep 21 2023 - 10:09:00 UTC)
Iridium Next flare with cmos camera Kevin Fetter via Seesat-l (Thu Sep 21 2023 - 12:12:51 UTC)
unid satellite maybe Kevin Fetter via Seesat-l (Thu Sep 21 2023 - 12:18:59 UTC)
DMB Obs Sep 20/21 David Brierley via Seesat-l (Thu Sep 21 2023 - 15:27:59 UTC)
SATOBS ML (4353), 20 Sep 2023 (Pt II): USA 236, USA 269, Mentor 8, Vortex 1, Sicral 1B Marco Langbroek via Seesat-l (Thu Sep 21 2023 - 22:12:09 UTC)
STARLINK OBS JAY RESPLER via Seesat-l (Fri Sep 22 2023 - 04:08:39 UTC)
STARLINK OBS JAY RESPLER via Seesat-l (Fri Sep 22 2023 - 05:16:33 UTC)
EV Obs 2023-09-21/22 E. Visser via Seesat-l (Fri Sep 22 2023 - 12:59:10 UTC)
TS Obs 2023-09-21/22 Tomi Simola via Seesat-l (Fri Sep 22 2023 - 14:26:11 UTC)
STARLINK, ONEWEB OBS JAY RESPLER via Seesat-l (Fri Sep 22 2023 - 20:56:47 UTC)
EV Obs 2023-09-22/23 E. Visser via Seesat-l (Sat Sep 23 2023 - 11:45:48 UTC)
DMB Obs Sep 21-23 David Brierley via Seesat-l (Sat Sep 23 2023 - 11:47:35 UTC)
LB Obs 2023 Sep 23-24 Leo Barhorst via Seesat-l (Sun Sep 24 2023 - 06:27:14 UTC)
SATOBS ML (4353), 23 Sep 2023: PAN, Mercury 1, Mentor 4 , Sicral 2 Marco Langbroek via Seesat-l (Sun Sep 24 2023 - 09:54:02 UTC)
SATOBS ML (4353), 23 Sep 2023 (Pt II): HEO Marco Langbroek via Seesat-l (Sun Sep 24 2023 - 13:48:00 UTC)
LB Obs 2023 Sep 24-25 Leo Barhorst via Seesat-l (Mon Sep 25 2023 - 07:25:27 UTC)
2023SEP24-25.OBS Russell Eberst via Seesat-l (Mon Sep 25 2023 - 10:41:40 UTC)
slow moving unid seen Kevin Fetter via Seesat-l (Mon Sep 25 2023 - 11:25:53 UTC)
4541 SATOBS 25 SEP 2023, Ofeq 10.see alberto.rango––– via Seesat–l (Mon Sep 25 2023 - 12:20:55 UTC)
Starlink 6-18 observation ronlee––– via Seesat–l (Mon Sep 25 2023 - 12:33:42 UTC)
TS Obs 2023-09-24/25 Tomi Simola via Seesat-l (Mon Sep 25 2023 - 13:16:03 UTC)
DMB Obs Sep 25 am David Brierley via Seesat-l (Mon Sep 25 2023 - 13:44:13 UTC)
EV Obs 2023-09-24/25 E. Visser via Seesat-l (Mon Sep 25 2023 - 17:20:19 UTC)
obs and orbit to show where the slow moving unid was seen. Kevin Fetter via Seesat-l (Mon Sep 25 2023 - 21:49:00 UTC)
LB Obs 2023 Sep 25-26 Leo Barhorst via Seesat-l (Tue Sep 26 2023 - 06:04:54 UTC)
2023SEP25-26.OBS Russell Eberst via Seesat-l (Tue Sep 26 2023 - 09:38:23 UTC)
EV Obs 2023-09-25/26 E. Visser via Seesat-l (Tue Sep 26 2023 - 17:35:13 UTC)
SATOBS ML (4353), 23 Sep 2023 (Pt III): various GEO Marco Langbroek via Seesat-l (Tue Sep 26 2023 - 18:09:28 UTC)
LB Obs 2023 Sep 26 pm Leo Barhorst via Seesat-l (Wed Sep 27 2023 - 05:43:21 UTC)
2023SEP27.OBS Russell Eberst via Seesat-l (Wed Sep 27 2023 - 08:12:23 UTC)
TS Obs 2023-09-26/27 Tomi Simola via Seesat-l (Wed Sep 27 2023 - 12:42:39 UTC)
EV Obs 2023-09-26/27 E. Visser via Seesat-l (Wed Sep 27 2023 - 15:35:38 UTC)
Sept 25 unid was CZ-3R/B. Kevin Fetter via Seesat-l (Wed Sep 27 2023 - 23:24:40 UTC)
LB Obs 2023 Sep 27 pm Leo Barhorst via Seesat-l (Thu Sep 28 2023 - 00:07:14 UTC)
EV Obs 2023-09-27/28 E. Visser via Seesat-l (Thu Sep 28 2023 - 19:16:47 UTC)
4541 SATOBS 29 SEP 2023, Ofeq 10. alberto.rango––– via Seesat–l (Fri Sep 29 2023 - 12:47:17 UTC)
2023SEP29.OBS Russell Eberst via Seesat-l (Sat Sep 30 2023 - 09:22:56 UTC)
EV Obs 2023-09-29/30 E. Visser via Seesat-l (Sat Sep 30 2023 - 11:28:46 UTC)
My unid of 2023 Sep 29 Russell Eberst via Seesat-l (Sat Sep 30 2023 - 13:03:27 UTC)

SeeSat-L Sep-23 by thread