| Ephemeris for Mars
|
|     DATE     | Time  | Age of  | RIGHT ASCENS | DECLINATION | Rise  | Culm  | Set   | Approx|    Observable     | Constellation
| Year Mth Day |       | Moon    | hour min sec | deg min sec |       |       |       | Mag.  |                   |
|
| 1981  07  13 | 20:00 | 11 days |   05  48  13 | +23  50  54 | 03:25 | 11:04 | 18:43 |  1.54 |    Not observable | Taurus
| 1981  07  14 | 20:00 | 12 days |   05  51  11 | +23  52  16 | 03:24 | 11:03 | 18:42 |  1.55 |    Not observable | Taurus
| 1981  07  15 | 20:00 | 13 days |   05  54  09 | +23  53  26 | 03:23 | 11:02 | 18:41 |  1.55 |    Not observable | Taurus
| 1981  07  16 | 20:00 | 14 days |   05  57  07 | +23  54  23 | 03:22 | 11:01 | 18:40 |  1.55 |    Not observable | Taurus
| 1981  07  17 | 20:00 | 15 days |   06  00  05 | +23  55  07 | 03:21 | 11:00 | 18:39 |  1.55 |    Not observable | Taurus
| 1981  07  18 | 20:00 | 16 days |   06  03  02 | +23  55  39 | 03:20 | 10:59 | 18:38 |  1.56 |    Not observable | Gemini
| 1981  07  19 | 20:00 | 17 days |   06  06  00 | +23  55  58 | 03:19 | 10:58 | 18:37 |  1.56 |    Not observable | Gemini
| 1981  07  20 | 20:00 | 18 days |   06  08  57 | +23  56  05 | 03:18 | 10:57 | 18:36 |  1.56 |    Not observable | Gemini
| 1981  07  21 | 20:00 | 19 days |   06  11  53 | +23  55  59 | 03:17 | 10:56 | 18:35 |  1.56 |    Not observable | Gemini
| 1981  07  22 | 20:00 | 20 days |   06  14  50 | +23  55  41 | 03:16 | 10:55 | 18:34 |  1.56 |    Not observable | Gemini
| 1981  07  23 | 20:00 | 21 days |   06  17  46 | +23  55  11 | 03:15 | 10:54 | 18:33 |  1.57 |    Not observable | Gemini
| 1981  07  24 | 20:00 | 22 days |   06  20  42 | +23  54  29 | 03:14 | 10:53 | 18:32 |  1.57 |    Not observable | Gemini
| 1981  07  25 | 20:00 | 23 days |   06  23  38 | +23  53  34 | 03:13 | 10:52 | 18:31 |  1.57 |    Not observable | Gemini
| 1981  07  26 | 20:00 | 24 days |   06  26  34 | +23  52  27 | 03:12 | 10:51 | 18:30 |  1.57 | 04:36 until 04:37 | Gemini
| 1981  07  27 | 20:00 | 26 days |   06  29  29 | +23  51  09 | 03:11 | 10:50 | 18:29 |  1.57 | 04:35 until 04:38 | Gemini
| 1981  07  28 | 20:00 | 27 days |   06  32  24 | +23  49  38 | 03:10 | 10:49 | 18:28 |  1.58 | 04:34 until 04:39 | Gemini
| 1981  07  29 | 20:00 | 28 days |   06  35  19 | +23  47  55 | 03:09 | 10:48 | 18:27 |  1.58 | 04:33 until 04:41 | Gemini
| 1981  07  30 | 20:00 | 29 days |   06  38  13 | +23  46  01 | 03:09 | 10:47 | 18:26 |  1.58 | 04:32 until 04:42 | Gemini
| 1981  07  31 | 20:00 | 00 days |   06  41  07 | +23  43  55 | 03:08 | 10:46 | 18:24 |  1.58 | 04:31 until 04:43 | Gemini
| 1981  08  01 | 20:00 | 01 days |   06  44  01 | +23  41  37 | 03:07 | 10:45 | 18:23 |  1.58 | 04:30 until 04:44 | Gemini
| 1981  08  02 | 20:00 | 02 days |   06  46  54 | +23  39  07 | 03:06 | 10:44 | 18:22 |  1.58 | 04:29 until 04:45 | Gemini
| 1981  08  03 | 20:00 | 03 days |   06  49  47 | +23  36  26 | 03:05 | 10:43 | 18:21 |  1.59 | 04:29 until 04:47 | Gemini
| 1981  08  04 | 20:00 | 04 days |   06  52  40 | +23  33  34 | 03:04 | 10:42 | 18:20 |  1.59 | 04:28 until 04:48 | Gemini
| 1981  08  05 | 20:00 | 05 days |   06  55  32 | +23  30  30 | 03:03 | 10:41 | 18:18 |  1.59 | 04:27 until 04:49 | Gemini
| 1981  08  06 | 20:00 | 06 days |   06  58  24 | +23  27  16 | 03:03 | 10:40 | 18:17 |  1.59 | 04:26 until 04:50 | Gemini
|
| All times computed for Cambridge (latitude 42.38; longitude -71.11)
|      and expressed in Cambridge time.
|
| Ephemeris computed by Dominic Ford.
| <https://in-the-sky.org/>