| Ephemeris for 117P/Helin-Roman-Alu | | DATE | Time | Age of | RIGHT ASCENS | DECLINATION | Rise | Culm | Set | Approx| Observable | Constellation | Year Mth Day | | Moon | hour min sec | deg min sec | | | | Mag. | | | | 2023 06 01 | 20:00 | 12 days | 00 17 40 | -06 39 21 | 03:07 | 08:48 | 14:29 | 15.85 | Not observable | Cetus | 2023 06 02 | 20:00 | 13 days | 00 18 33 | -06 34 57 | 03:04 | 08:45 | 14:27 | 15.85 | Not observable | Cetus | 2023 06 03 | 20:00 | 14 days | 00 19 27 | -06 30 38 | 03:00 | 08:42 | 14:24 | 15.85 | Not observable | Cetus | 2023 06 04 | 20:00 | 15 days | 00 20 20 | -06 26 24 | 02:57 | 08:39 | 14:21 | 15.84 | Not observable | Pisces | 2023 06 05 | 20:00 | 16 days | 00 21 12 | -06 22 14 | 02:54 | 08:36 | 14:18 | 15.84 | Not observable | Pisces | 2023 06 06 | 20:00 | 17 days | 00 22 03 | -06 18 10 | 02:50 | 08:33 | 14:15 | 15.84 | Not observable | Pisces | 2023 06 07 | 20:00 | 19 days | 00 22 54 | -06 14 10 | 02:47 | 08:30 | 14:12 | 15.84 | Not observable | Pisces | 2023 06 08 | 20:00 | 20 days | 00 23 44 | -06 10 15 | 02:44 | 08:27 | 14:09 | 15.84 | Not observable | Pisces | 2023 06 09 | 20:00 | 21 days | 00 24 34 | -06 06 25 | 02:41 | 08:24 | 14:07 | 15.83 | Not observable | Pisces | 2023 06 10 | 20:00 | 22 days | 00 25 23 | -06 02 40 | 02:37 | 08:20 | 14:04 | 15.83 | Not observable | Pisces | 2023 06 11 | 20:00 | 23 days | 00 26 11 | -05 59 00 | 02:34 | 08:17 | 14:01 | 15.83 | Not observable | Cetus | 2023 06 12 | 20:00 | 24 days | 00 26 59 | -05 55 25 | 02:31 | 08:14 | 13:58 | 15.83 | Not observable | Cetus | 2023 06 13 | 20:00 | 25 days | 00 27 46 | -05 51 56 | 02:27 | 08:11 | 13:55 | 15.82 | Not observable | Cetus | 2023 06 14 | 20:00 | 26 days | 00 28 32 | -05 48 31 | 02:24 | 08:08 | 13:52 | 15.82 | Not observable | Cetus | 2023 06 15 | 20:00 | 27 days | 00 29 18 | -05 45 13 | 02:20 | 08:05 | 13:49 | 15.82 | Not observable | Cetus | 2023 06 16 | 20:00 | 28 days | 00 30 03 | -05 41 59 | 02:17 | 08:01 | 13:46 | 15.82 | 04:19 until 04:20 | Cetus | 2023 06 17 | 20:00 | 29 days | 00 30 47 | -05 38 51 | 02:14 | 07:58 | 13:43 | 15.81 | 04:16 until 04:20 | Cetus | 2023 06 18 | 20:00 | 00 days | 00 31 31 | -05 35 48 | 02:10 | 07:55 | 13:40 | 15.81 | 04:12 until 04:20 | Cetus | 2023 06 19 | 20:00 | 01 days | 00 32 14 | -05 32 51 | 02:07 | 07:52 | 13:37 | 15.81 | 04:09 until 04:21 | Cetus | 2023 06 20 | 20:00 | 02 days | 00 32 56 | -05 30 00 | 02:04 | 07:49 | 13:34 | 15.81 | 04:06 until 04:21 | Cetus | 2023 06 21 | 20:00 | 03 days | 00 33 37 | -05 27 14 | 02:00 | 07:45 | 13:31 | 15.80 | 04:02 until 04:21 | Cetus | 2023 06 22 | 20:00 | 04 days | 00 34 18 | -05 24 33 | 01:57 | 07:42 | 13:27 | 15.80 | 03:59 until 04:21 | Cetus | 2023 06 23 | 20:00 | 05 days | 00 34 57 | -05 21 59 | 01:53 | 07:39 | 13:24 | 15.80 | 03:55 until 04:21 | Cetus | 2023 06 24 | 20:00 | 06 days | 00 35 36 | -05 19 30 | 01:50 | 07:36 | 13:21 | 15.80 | 03:52 until 04:22 | Cetus | 2023 06 25 | 20:00 | 07 days | 00 36 15 | -05 17 07 | 01:47 | 07:32 | 13:18 | 15.79 | 03:48 until 04:22 | Cetus | | All times computed for Ashburn (latitude 39.04; longitude -77.49) | and expressed in Ashburn time. | | Ephemeris computed by Dominic Ford. |