FOR 1897. HENRY ECKFORD RHOADES, Editor: ECLIPSES, 1897. (Astronomical calculations made expressly for The Tribune Almanac by Berlin H. Wright, Penn Yan, N. Y.) There will be two eclipses this year, both of the sun, and visible as follows: I. An annular eclipse of the sun, February 1, visible in the Southern and Atlantie States, near sunset, as a small partial eclipse upon the sun's southern limb. The eclipse will be invisible north of a line drawn from near Lowell, Mass., through Harrisburg, Penn., Memphis, Texarkana and Waco, Tex. At Boston, New-York, Philadelphia, Washington and Nashville the eclipse will be very small, being scarcely more than a contact of limbs about sunset, the sun setting with the eclipse on. This eclipse will return February 13, 1915, when it will be visible in South Africa. II. An annular eclipse of the sun, July 29, visible as a partial eclipse upon the sun's southern limb throughout the United States, except in Alaska. This eclipse will return August 10, 1915, when it will be visible in India and Southern Asia. TO FIND THE TIME OF GREATEST ELONGATION OF POLARIS. TABLE I. for By adding the numbers in the annexed table for any given latitude to the time of meridian passage of Polaris (the Pole Star), in Table III, the time of its greatest western elongation is found. If the same number be subtracted instead of added, we get the time of greatest eastern elongation. At the time of either elongation the magnetic bearing Constant may be taken with the transit compass, using that Elonga elongation which occurs at tion. night. The eastern elɔngations occur at night from H. M. S. April 1 to October 11, and the western elongations occur at night all the rest of the year. Correct local time 5:54:35 is to be used, and bearings 5:54:30 on the star taken promptly 40 00 5:54:48 Constant Latitude North. for Elonga- Latitude North. Constant Latitude North. tion. H. M. S. 29 00 5:56:14 202920 32 30 5:55:50 5:04:51 3:02:58 1:12:53 11:10:59 9:13:02 TABLE II. MEAN TIME OF SIDEREAL NOON, OR MERIDIAN PASSAGE OF THE VERNAL EQUINOX AT WASHINGTON, C., 821 FOR 1897. (For other places, add 9.83 seconds for each hour of longitude east of Washington, and subtract 9.83 seconds for each hour of January. February Eve. H. M. S. March. April. Eve. H. M. S. Morn. H. M. S. 11:18:51 May. H. M. S. 7:11:09 5:13:12 3:11:18 9:09:06 7:07:13 5:09:16 3:07:22 1:05:29 11:03:36 1:05:01 11:03:08 9:05:10 7:03:17 5:05:20 3:03:26 1:01:33 10:59:40 1:01:05 10:59:12 9:01:14 6:59:21 5:01:24 2:59:31 0:57:37 10:55:44 0:57:09 10:55:16 8:57:19 6:55:25 4:57:28 2:55:35 0:53:41 10:51:48 0:53:13 10:51:20 8:53:23 6:51:29 4:53:32 2:51:39 0:49:46 10:47:52 0:49:17 10:47:24 8:49:27 6:47:33 4:49:36 2:47:43 0:45:50 10:43:57 0:45:21 10:43:28 8:45:31 6:43:38 4:45:40 2:43:47 0:41:54 10:40:01 0:41:25 10:39:32 8:41:35 6:39:42 4:41:44 2:39:51 0:37:58 10:36:05 0:37:29 10:35:36 6:35:46 4:37:48 2:35:55 0:34:02 10:32:09 4:33:52 2:31:59 4:29:57 2:28:03 4:26:01 2:24:07 4:22:05 2:20:11 0:18:18 10:16:25 8:14:32 6:16:35 6:16:06 4:18:09 2:16:16 0:14:22 10:12:29 6:12:10 4:14:13 2:12:20 0:10:27 10:08:33 6:08:14 4:10:17 2:08:24 8:06:12 6:04:18 4:06:21 2:04:28 10:00:13 8:02:16 6:00:22 4:02:25 2:00:32 Even. 9:56:17 7:58:21 5:56:27 3:58:29 1:56:36 11:50:47 9:52:21 7:54:24 5:52:31 3:54:33 1:52:40 11:46:51 11:50:18 9:48:25 7:50:28 3:50:37 1:48:44 11:42:55 11:46:23 9:44:29 11:42:27 8:10:36 6:12:39 30. 3:18:42 31. 3:14:46 11:38:31 9:36:38 7:38:40 5:36:47 3:38:50 1:36:56 11:31:07 9:33:10 7:31:17 5:33:20 3:34:54 1:33:00 11:27:12 9:29:14 7:27:21 5:29:24 3:30:58 1:29:05 11:23:16 9:25:18 7:23:25 5:25:28 3:27:02 1:25:09 11:19:20 9:21:22 7:19:29 5:21:32 3:23:06 1:21:13 9:17:27 5:17:30 TABLE III. TIMES OF UPPER MERIDIAN PASSAGE OF POLARIS, OR NORTH STAR, 1897. Surveyors and civil engineers may obtain the variation of the magnetic needle for any place in the United States by directing their compass to the North Star (Polaris) when it is upon the meridian, as given in the table below, for the upper culmination: or 11 hours 58 minutes 2 seconds, before or after, when the star is on the lower meridian. Exact local time is used in the table, and the timepiece used must be correct, and the bearing of the star taken promptly on time, and that bearing will be the true variation of the needle. An error of only a few seconds in the timepiece will vitiate the bearing found; therefore, it will be much better to take the bearing when the star is furthest east or west, at its greatest elongation, as observations made upon it then are not affected materially by small errors of timepieces. To use this table for places west of Washington, add 9.83 seconds for each hour of longitude east of Washington, and subtract 9.83 seconds for each hour west of it. From February 1 to August 1, use the lower culmination. 5:06:55 3:04:36 1:14:16 11:16:20 | 9:18:41 11:12:25 | 7:17:15 5:19:48 9:14:45 7:13:20 5:15:53 3:14:29 11:22:57 1:24:42 1:20:46 11:19:01 3:18:24 1:16:50 11:15:05 1:12:55 9:20:56 7:22:38 9:17:00 7:18:41 9:13:04 7:14:44 11:11:09 9:09:08 7:10:47 11:08:29 | 9:10:49 11:04:33 1:02:29 11:00:38 0:58:32 10:56:43 8:59:04 6:57:40 5:00:15 2:44:52 0:54:36 10:52:47 8:55:09 6:53:46 4:56:19 0:50:40 10:48:52 8:51:14 6:49:51 0:46:44 10:44:56 8:47:20 6:44:56 0:42:47 8:43:25 7:09:25 5:11:58 3:10:34 1:09:00 11:07:13 9:05:12 7:06:50 9:06:54 7:05:30 5:08:03 3:06:39 1:05:04 11:03:17 9:01:15 7:02:53 9:02:59 7:01:35 5:04:10 1:01:08 10:59:21 0:57:13 2:54:52 0:53:17 10:51:29 2:50:58 0:49:22 10:47:33 2:47:03 0:45:27 10:43:37 8:57:19 6:58:56 10:55:25 4:44:34 2:43:08 10:39:42 6:39:13 A TABLE OF ONE HUNDRED AND THIRTEEN BRIGHT STARS. To ascertain when any star or constellation found in the following Table will be on the upper meridian, add the numbers opposite in the left-hand column of figures to the time of "Sidereal Noon" found in Table II. For the rising of a star, subtract the number opposite in the right-hand column of figures from its meridian passage. For the setting of a star, add the same number to its meridian passage. Those marked (...) revolve in a circle of perpetual apparition, and do not rise nor set north of the latitude of New-York (40° 42′ 40′′). Stars having an asterisk (*) in the last column are seen only in Florida and Texas, when passing the meridian. a Persei (Algenib)... 7 Tauri (The Seven Stars) a Tauri (Aldebaran).. a Auriga (Capella) 8 Orionis (Rigel) y Orionis (Bellatrix).. B Tauri (El Nath) B Canis Majoris (Mirzam). a Argus (Canopus). Canis Majoris (Aludra).. ................. € Argus • Argus ... 528 Ursa Majoris (Merak). 510 Leonis 258 Leonis (Zozma)...... H. M.H. M. 10 54 10 56 76 57 37 0 4 0 8 6 11 0 20 2 0 35 B Leonis (Denebola).. y Ursa Majoris (Phad) 11 46 0 50 al Crucis (Acrux) y Crucis.. B Corvi... 1 21 e Ursa Majoris (Alioth) 1 34 8 Virginis 1 46 5 22e Virginis.. 1 49 7 14 a Virginis (Spica) 1 57 6 1 57 9 2 ........... 7 Ursa Majoris (Mizar)........ 2 38 6 9 a Bootes (Arcturus).. 13 a2 Libre... 108 Ursa Minoris (Kochab) B Libre... 2 11 5 2 56 6 8 10 14 8 Scorpii.. 5 ........ ...15 87 6 15 52 4 87 15 57 4 49 16 20 4 20 29 a Corona Borealis (Alphecca).. 4 29 6 58 a Serpentis (Unuk)........ 95 31 81 Scorpii... 5 18 6 21 a Scorpii (Antares)...... 5 80 5 56 A Scorpii (Lesuth)....... 5 42 5 26 a Aræ... 5 49 6 26 8 Draconis (Rastoban)...... 6 87 24 a Ophiuchi (Ras Alhague).. 6 21 $ e Sagittarii. 6 17 4 6 31 6 59 a Lyra (Vega)... 6 377 36 8 Lyræ.. 640 5 1 Sagittarii 6 54 4 7a Aquile (Altair).. 7 13 7 22 a2 Capricorni (Giedi).... 7 19 4 5 a Pavonis 7 27 8 11 a Cygni (Deneb).......... 7 33 6 19 a Cephei (Alderamin).. 7 38 7 50 8 8 Aquarii. 51 31 8 Cephei (Alphirk). 8 19 * Pegasi (Enif). 7 59 2 58 a Aquarii 9 13 * a Gruis 21 58 1 21 Example. The seven stars will be on the meridian for January 1, 1897, at 8h. 53m. 43s., evening, and will set at 4h. 22m. 43s. in the morning of January 2, and would rise at 1h. 24m. 43s. in the afternoon of the 1st, but would not be visible then, the sun being up. |