Sky transparency — night of 28–29 June 2026

No cloud onset detected. The transparency index held at 100 (IQR 34–350) across 33 light frames. The 23:58 autofocus run fitted its curve on almost no stars and should not be trusted.

Transparency index

100 · IQR 34–350

Light frames

Autofocus runs

Failures

88 · solve + PHD2

Normalised transparency index, by filter

100 = that target and filter's own clear‑sky median (this night's own pre-cloud median). Shaded columns are autofocus runs; the first target is named at the top left and dashed vertical rules mark each target change; ticks along the base are errors.

H α O III S II ▲ Plate solve failed ◆ PHD2 error

All‑sky background brightness

Mean luminance of the upper sky per all‑sky still — independent of anything N.I.N.A. recorded. The camera auto‑exposes, so this is an instrumental number, not photometry.

Clear‑sky reference medians

The divisors behind the index — median detected stars per light sub.

Target	Filter	Median stars	Frames
Gum 41	H	101	12
Gum 41	O	22	10
Gum 41	S	287	9
NGC 346	H	2	1
NGC 346	S	3	1

Event timeline

All observatory events with their attributed causes.

19:22:12PHD2timed-out waiting for guider to settlepost_slew

19:33:58PHD2timed-out waiting for guider to settleunexplained

20:04:39AF failedautofocus run started 20:03:17 did not completeunexplained

20:13:00AF rejectednew focus point HFR 3.6205504632627337 significantly worse than originalunexplained

20:13:00AF failedautofocus run started 20:11:12 did not completeunexplained

20:26:18PHD2timed-out waiting for guider to settlepost_slew

20:52:55AF failedautofocus run started 20:51:27 did not completeunexplained

21:05:00PHD2timed-out waiting for guider to settleunexplained

21:15:05solve failedASTAP plate solve failedunexplained

21:15:21solve failedASTAP plate solve failedunexplained

21:20:04solve failedASTAP plate solve failedunexplained

21:20:16solve failedASTAP plate solve failedunexplained

21:21:04PHD2timed-out waiting for guider to settleunexplained

21:26:07solve failedASTAP plate solve failedunexplained

21:26:20solve failedASTAP plate solve failedunexplained

21:28:04AF failedautofocus run started 21:26:07 did not completeunexplained

21:30:30AF rejectednew focus point HFR 4.2245177962493505 significantly worse than originalunexplained

21:30:30AF failedautofocus run started 21:28:44 did not completeunexplained

21:42:37PHD2timed-out waiting for guider to settleunexplained

21:44:20AF failedautofocus run started 21:42:38 did not completeunexplained

22:19:42solve failedASTAP plate solve failedunexplained

22:19:53solve failedASTAP plate solve failedunexplained

22:24:42solve failedASTAP plate solve failedunexplained

22:24:47solve failedASTAP plate solve failedunexplained

22:25:23AF failedautofocus run started 22:24:42 did not completeunexplained

22:31:29solve failedASTAP plate solve failedunexplained

22:31:34solve failedASTAP plate solve failedunexplained

22:32:31PHD2timed-out waiting for guider to settleunexplained

22:36:29solve failedASTAP plate solve failedunexplained

22:36:30solve failedASTAP plate solve failedunexplained

22:41:30solve failedASTAP plate solve failedunexplained

22:41:31solve failedASTAP plate solve failedunexplained

22:46:30solve failedASTAP plate solve failedunexplained

22:46:36solve failedASTAP plate solve failedunexplained

22:51:33solve failedASTAP plate solve failedunexplained

22:51:43solve failedASTAP plate solve failedunexplained

22:52:38PHD2timed-out waiting for guider to settleunexplained

22:57:40solve failedASTAP plate solve failedunexplained

22:57:46solve failedASTAP plate solve failedunexplained

22:58:24AF failedautofocus run started 22:57:39 did not completeunexplained

23:00:26PHD2timed-out waiting for guider to settleunexplained

23:04:31solve failedASTAP plate solve failedunexplained

23:09:31solve failedASTAP plate solve failedunexplained

23:09:32solve failedASTAP plate solve failedunexplained

23:10:17AF failedautofocus run started 23:09:38 did not completeunexplained

23:12:56PHD2timed-out waiting for guider to settleunexplained

23:16:23solve failedASTAP plate solve failedunexplained

23:16:28solve failedASTAP plate solve failedunexplained

23:17:24PHD2timed-out waiting for guider to settleunexplained

23:18:01AF failedautofocus run started 23:17:24 did not completeunexplained

23:22:35PHD2timed-out waiting for guider to settleunexplained

23:24:07solve failedASTAP plate solve failedunexplained

23:24:13solve failedASTAP plate solve failedunexplained

23:26:07AF failedautofocus run started 23:24:06 did not completeunexplained

23:31:15solve failedASTAP plate solve failedunexplained

23:31:27solve failedASTAP plate solve failedunexplained

23:32:35AF failedautofocus run started 23:31:14 did not completeunexplained

23:37:45solve failedASTAP plate solve failedunexplained

23:37:53solve failedASTAP plate solve failedunexplained

23:39:27AF rejectednew focus point HFR 4.90667632944556 significantly worse than originalunexplained

23:39:27AF failedautofocus run started 23:37:46 did not completeunexplained

23:43:38PHD2timed-out waiting for guider to settleunexplained

23:45:38solve failedASTAP plate solve failedunexplained

23:45:50solve failedASTAP plate solve failedunexplained

23:50:38solve failedASTAP plate solve failedunexplained

23:50:51solve failedASTAP plate solve failedunexplained

23:55:38solve failedASTAP plate solve failedunexplained

23:55:45solve failedASTAP plate solve failedunexplained

23:56:47AF failedautofocus run started 23:55:37 did not completeunexplained

23:58:47PHD2timed-out waiting for guider to settlepost_slew

00:03:03PHD2timed-out waiting for guider to settlepost_slew

00:04:49PHD2failed to find a suitable guide starpost_slew

00:13:48solve failedASTAP plate solve failedunexplained

00:13:53solve failedASTAP plate solve failedunexplained

00:18:48solve failedASTAP plate solve failedunexplained

00:18:49solve failedASTAP plate solve failedunexplained

00:23:48solve failedASTAP plate solve failedunexplained

00:23:49solve failedASTAP plate solve failedunexplained

00:28:51solve failedASTAP plate solve failedunexplained

00:28:52solve failedASTAP plate solve failedunexplained

00:33:52solve failedASTAP plate solve failedunexplained

00:33:53solve failedASTAP plate solve failedunexplained

00:34:25AF failedautofocus run started 00:33:51 did not completeunexplained

00:39:31solve failedASTAP plate solve failedunexplained

00:39:36solve failedASTAP plate solve failedunexplained

00:44:31solve failedASTAP plate solve failedunexplained

00:44:32solve failedASTAP plate solve failedunexplained

00:49:34solve failedASTAP plate solve failedunexplained

00:49:40solve failedASTAP plate solve failedunexplained

00:54:34solve failedASTAP plate solve failedunexplained

00:54:35solve failedASTAP plate solve failedunexplained

00:59:35solve failedASTAP plate solve failedunexplained

00:59:36solve failedASTAP plate solve failedunexplained

01:04:35solve failedASTAP plate solve failedunexplained

01:04:36solve failedASTAP plate solve failedunexplained

01:05:18AF failedautofocus run started 01:04:42 did not completeunexplained

01:10:23solve failedASTAP plate solve failedunexplained

01:10:24solve failedASTAP plate solve failedunexplained

01:15:23solve failedASTAP plate solve failedunexplained

01:15:24solve failedASTAP plate solve failedunexplained

01:20:24solve failedASTAP plate solve failedunexplained

01:20:25solve failedASTAP plate solve failedunexplained

01:25:24solve failedASTAP plate solve failedunexplained

01:25:25solve failedASTAP plate solve failedunexplained

01:30:27solve failedASTAP plate solve failedunexplained

01:30:28solve failedASTAP plate solve failedunexplained

All 174 frames

Time	Class	Target	Filter	Exp	Stars	HFR	Index
19:18:04	autofocus	Gum 41	H	4s	23	15.52	—
19:18:16	autofocus	Gum 41	H	4s	139	5.06	—
19:18:24	autofocus	Gum 41	H	4s	122	5.42	—
19:18:32	autofocus	Gum 41	H	4s	80	7.28	—
19:18:43	autofocus	Gum 41	H	4s	53	9.48	—
19:18:57	autofocus	Gum 41	H	4s	284	3.55	—
19:19:11	autofocus	Gum 41	H	4s	428	2.96	—
19:19:25	autofocus	Gum 41	H	4s	535	2.48	—
19:19:39	autofocus	Gum 41	H	4s	484	2.95	—
19:19:53	autofocus	Gum 41	H	4s	276	4.69	—
19:20:05	autofocus	Gum 41	H	4s	150	6.40	—
19:20:17	autofocus	Gum 41	H	4s	302	4.12	—
19:27:15	light	Gum 41	H	300s	459	5.00	454%
19:32:59	light	Gum 41	H	300s	408	5.34	404%
19:39:00	autofocus	Gum 41	H	300s	383	5.73	—
19:39:07	autofocus	Gum 41	H	4s	130	6.03	—
19:39:19	autofocus	Gum 41	H	4s	58	9.47	—
19:39:27	autofocus	Gum 41	H	4s	43	9.73	—
19:39:35	autofocus	Gum 41	H	4s	69	8.41	—
19:39:45	autofocus	Gum 41	H	4s	183	5.49	—
19:39:55	autofocus	Gum 41	H	4s	366	3.56	—
19:40:05	autofocus	Gum 41	H	4s	527	2.75	—
19:40:15	autofocus	Gum 41	H	4s	541	2.48	—
19:40:25	autofocus	Gum 41	H	4s	411	3.02	—
19:40:35	autofocus	Gum 41	H	4s	243	4.01	—
19:40:43	autofocus	Gum 41	H	4s	86	7.73	—
19:40:57	autofocus	Gum 41	H	4s	363	3.10	—
19:46:33	light	Gum 41	H	300s	910	3.30	901%
19:52:05	light	Gum 41	O	300s	1187	4.51	5395%
19:57:38	light	Gum 41	O	300s	1069	4.97	4859%
20:02:50	light	Gum 41	O	300s	1037	4.90	4714%
20:03:27	other	Gum 41	O	4s	192	4.32	—
20:03:39	other	Gum 41	O	4s	442	3.16	—
20:03:47	other	Gum 41	O	4s	389	3.45	—
20:03:55	other	Gum 41	O	4s	489	2.94	—
20:04:05	other	Gum 41	O	4s	414	3.06	—
20:04:15	other	Gum 41	O	4s	332	3.43	—
20:04:25	other	Gum 41	O	4s	234	3.84	—
20:04:39	other	Gum 41	O	4s	283	4.13	—
20:10:23	light	Gum 41	O	300s	1823	3.27	8286%
20:11:25	other	Gum 41	S	5s	596	2.90	—
20:11:38	other	Gum 41	S	5s	552	3.18	—
20:11:48	other	Gum 41	S	5s	610	2.99	—
20:11:58	other	Gum 41	S	5s	605	2.95	—
20:12:10	other	Gum 41	S	5s	640	2.66	—
20:12:22	other	Gum 41	S	5s	543	3.01	—
20:12:34	other	Gum 41	S	5s	313	3.75	—
20:12:44	other	Gum 41	S	5s	161	5.96	—
20:13:00	other	Gum 41	S	5s	348	3.62	—
20:18:02	autofocus	Gum 41	S	5s	340	3.79	—
20:18:17	autofocus	Gum 41	S	5s	514	3.16	—
20:18:26	autofocus	Gum 41	S	5s	579	3.02	—
20:18:36	autofocus	Gum 41	S	5s	608	2.97	—
20:18:48	autofocus	Gum 41	S	5s	631	2.83	—
20:19:00	autofocus	Gum 41	S	5s	487	3.33	—
20:19:12	autofocus	Gum 41	S	5s	247	4.99	—
20:19:22	autofocus	Gum 41	S	5s	170	6.35	—
20:19:38	autofocus	Gum 41	S	5s	319	4.09	—
20:25:17	light	Gum 41	S	300s	1176	5.30	410%
20:31:21	light	Gum 41	S	300s	135	8.59	47%
20:36:21	light	Gum 41	S	300s	848	4.39	295%
20:41:21	light	Gum 41	S	300s	716	4.64	249%
20:46:29	light	Gum 41	H	300s	101	5.12	100%
20:51:29	light	Gum 41	H	300s	134	4.13	133%
20:51:38	other	Gum 41	H	4s	55	3.26	—
20:51:49	other	Gum 41	H	4s	67	3.31	—
20:51:57	other	Gum 41	H	4s	56	3.65	—
20:52:05	other	Gum 41	H	4s	78	3.06	—
20:52:15	other	Gum 41	H	4s	71	3.06	—
20:52:25	other	Gum 41	H	4s	72	3.02	—
20:52:35	other	Gum 41	H	4s	40	3.55	—
20:52:45	other	Gum 41	H	4s	27	3.44	—
20:52:55	other	Gum 41	H	4s	15	4.60	—
20:58:54	light	Gum 41	H	300s	70	4.29	69%
21:03:55	light	Gum 41	H	300s	104	3.59	103%
21:10:03	light	Gum 41	O	300s	4	5.55	18%
21:20:04	light	Gum 41	O	300s	7	3.12	32%
21:26:16	other	Gum 41	S	5s	27	3.84	—
21:26:28	other	Gum 41	S	5s	29	3.50	—
21:26:38	other	Gum 41	S	5s	27	3.29	—
21:26:49	other	Gum 41	S	5s	25	3.34	—
21:27:00	other	Gum 41	S	5s	28	3.40	—
21:27:12	other	Gum 41	S	5s	19	3.97	—
21:27:24	other	Gum 41	S	5s	13	3.74	—
21:27:36	other	Gum 41	S	5s	15	3.59	—
21:27:48	other	Gum 41	S	5s	6	3.93	—
21:28:04	other	Gum 41	S	5s	11	3.31	—
21:28:52	other	Gum 41	S	5s	44	3.02	—
21:29:06	other	Gum 41	S	5s	34	2.96	—
21:29:16	other	Gum 41	S	5s	32	3.22	—
21:29:26	other	Gum 41	S	5s	35	3.03	—
21:29:38	other	Gum 41	S	5s	45	2.87	—
21:29:50	other	Gum 41	S	5s	34	3.54	—
21:30:02	other	Gum 41	S	5s	25	3.90	—
21:30:14	other	Gum 41	S	5s	16	5.40	—
21:30:30	other	Gum 41	S	5s	25	4.22	—
21:36:11	light	Gum 41	S	300s	69	4.94	24%
21:42:46	other	Gum 41	S	5s	29	3.01	—
21:43:00	other	Gum 41	S	5s	20	3.22	—
21:43:10	other	Gum 41	S	5s	27	3.66	—
21:43:20	other	Gum 41	S	5s	28	3.16	—
21:43:32	other	Gum 41	S	5s	38	2.82	—
21:43:44	other	Gum 41	S	5s	38	2.71	—
21:43:56	other	Gum 41	S	5s	35	3.03	—
21:44:08	other	Gum 41	S	5s	25	3.23	—
21:44:20	other	Gum 41	S	5s	16	2.78	—
21:50:22	light	Gum 41	S	300s	287	2.95	100%
21:51:03	autofocus	Gum 41	S	5s	218	2.53	—
21:51:16	autofocus	Gum 41	S	5s	148	4.16	—
21:51:26	autofocus	Gum 41	S	5s	144	4.07	—
21:51:36	autofocus	Gum 41	S	5s	174	3.79	—
21:51:48	autofocus	Gum 41	S	5s	262	2.78	—
21:52:00	autofocus	Gum 41	S	5s	249	2.66	—
21:52:12	autofocus	Gum 41	S	5s	195	2.84	—
21:52:24	autofocus	Gum 41	S	5s	143	3.42	—
21:52:34	autofocus	Gum 41	S	5s	78	3.71	—
21:52:50	autofocus	Gum 41	S	5s	223	2.90	—
21:58:28	light	Gum 41	S	300s	361	4.48	126%
22:03:47	light	Gum 41	S	300s	283	4.72	99%
22:08:55	light	Gum 41	H	300s	81	4.60	80%
22:14:08	light	Gum 41	H	300s	36	4.60	36%
22:19:42	light	Gum 41	H	300s	12	5.13	12%
22:24:42	light	Gum 41	H	300s	3	6.56	3%
22:46:31	light	Gum 41	O	300s	4	4.89	18%
22:51:34	light	Gum 41	S	300s	10	4.30	3%
23:24:23	other	Gum 41	H	4s	3	3.58	—
23:24:31	other	Gum 41	H	4s	3	4.26	—
23:24:39	other	Gum 41	H	4s	2	7.83	—
23:24:49	other	Gum 41	H	4s	3	5.38	—
23:24:59	other	Gum 41	H	4s	3	4.44	—
23:25:41	other	Gum 41	H	4s	2	9.86	—
23:25:55	other	Gum 41	H	4s	2	10.05	—
23:26:07	other	Gum 41	H	4s	3	8.20	—
23:31:16	other	Gum 41	H	4s	19	4.46	—
23:31:21	other	Gum 41	H	4s	7	5.99	—
23:31:31	other	Gum 41	H	4s	6	5.40	—
23:31:40	other	Gum 41	H	4s	5	5.87	—
23:31:47	other	Gum 41	H	4s	8	5.20	—
23:31:57	other	Gum 41	H	4s	5	5.42	—
23:32:07	other	Gum 41	H	4s	7	4.56	—
23:32:17	other	Gum 41	H	4s	6	4.91	—
23:32:27	other	Gum 41	H	4s	7	4.38	—
23:32:35	other	Gum 41	H	4s	6	5.78	—
23:37:46	light	Gum 41	H	300s	10	5.24	10%
23:37:55	other	Gum 41	O	4s	17	3.98	—
23:38:07	other	Gum 41	O	4s	11	4.55	—
23:38:15	other	Gum 41	O	4s	9	4.88	—
23:38:23	other	Gum 41	O	4s	12	4.55	—
23:38:33	other	Gum 41	O	4s	14	4.01	—
23:38:43	other	Gum 41	O	4s	15	3.63	—
23:38:53	other	Gum 41	O	4s	14	4.18	—
23:39:03	other	Gum 41	O	4s	11	6.40	—
23:39:13	other	Gum 41	O	4s	7	6.66	—
23:39:27	other	Gum 41	O	4s	15	4.91	—
23:45:38	light	Gum 41	O	300s	22	5.11	100%
23:50:38	light	Gum 41	O	300s	11	5.81	50%
23:55:39	light	Gum 41	O	300s	8	6.11	36%
23:55:48	other	Gum 41	O	4s	2	5.92	—
23:56:01	other	Gum 41	O	4s	2	6.04	—
23:56:18	other	Gum 41	O	4s	2	5.82	—
23:56:27	other	Gum 41	O	4s	2	6.00	—
23:58:31	autofocus	NGC 346	H	4s	22	3.56	—
23:58:43	autofocus	NGC 346	H	4s	5	6.35	—
23:58:51	autofocus	NGC 346	H	4s	3	7.52	—
23:58:59	autofocus	NGC 346	H	4s	8	4.90	—
23:59:09	autofocus	NGC 346	H	4s	13	3.35	—
23:59:19	autofocus	NGC 346	H	4s	14	3.25	—
23:59:29	autofocus	NGC 346	H	4s	13	3.54	—
23:59:39	autofocus	NGC 346	H	4s	9	4.15	—
23:59:49	autofocus	NGC 346	H	4s	3	6.86	—
23:59:59	autofocus	NGC 346	H	4s	2	8.40	—
00:00:13	autofocus	NGC 346	H	4s	10	3.53	—
00:13:48	light	NGC 346	H	300s	2	4.95	100%
00:49:35	light	NGC 346	S	300s	3	3.82	100%

Star counts come from Hocus Focus detection on each saved sub, tagged with the filter in place at exposure start and the target then being imaged. Frames inside completed autofocus runs are excluded. Still capture times come from the AllSky filenames. All times are local.