B.R.A.S. small web logoMonthly Observing Information

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This page provides charts, and text concerning what is visible in the night sky during the month noted. All information is for Baton Rouge, Louisiana, but they can still provide useful information for most other areas of the U.S.A. Sky charts, Saturn ring plane, and Venus phase images are for Midnight, on the 15th day of the month. Sky charts are 100 degree field of view, and show objects down to 12th magnitude. Times in the text information are in 24 hour format and have been adjusted for Daylight Savings Time. Subtract 12 hours from those over 12 to get the equivalent PM. RA and DEC given are for Epoch 2000.

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Baton Rouge Clear Sky Clock
Click on image for more info and details. This clock is for the Baton Rouge area only.

Baton Rouge Clear Sky Clock

Kisatchie Clear Sky Clock
Click on image for more info and details. This clock is for the Kisatchie area only.

Kisatchie Clear Sky Clock

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December

Moon Calendar

Moon Calendar image

Sky charts

View/download sky chart north image View/download sky chart south image

View/download sky chart east image View/download sky chart west image

North South East West

Saturn’s Ring Plane

Saturn ring plane image

Venus Phase

Venus phase image

Sun and Moon Rise and Set

  Date       Moonrise   Moonset   Sunrise   Sunset   Twilight  Twilight
------------ --------- --------- --------- --------- --------- ---------
12/1/2017        15:51     04:15     06:44     17:04     05:19     18:28
12/2/2017        16:39     05:22     06:45     17:04     05:20     18:28
12/3/2017        17:32     06:30     06:46     17:04     05:21     18:28
12/4/2017        18:30     07:39     06:46     17:04     05:22     18:29
12/5/2017        19:34     08:43     06:47     17:04     05:22     18:29
12/6/2017        20:39     09:43     06:48     17:04     05:23     18:29
12/7/2017        21:45     10:36     06:49     17:04     05:24     18:29
12/8/2017        22:48     11:23     06:49     17:04     05:24     18:29
12/9/2017        23:49     12:04     06:50     17:04     05:25     18:30
12/10/2017      ------     12:42     06:51     17:04     05:26     18:30
12/11/2017       00:47     13:17     06:52     17:05     05:26     18:30
12/12/2017       01:44     13:52     06:52     17:05     05:27     18:30
12/13/2017       02:39     14:25     06:53     17:05     05:27     18:31
12/14/2017       03:33     15:01     06:54     17:06     05:28     18:31
12/15/2017       04:27     15:38     06:54     17:06     05:29     18:31
12/16/2017       05:21     16:17     06:55     17:06     05:29     18:32
12/17/2017       06:13     17:00     06:55     17:07     05:30     18:32
12/18/2017       07:04     17:45     06:56     17:07     05:30     18:33
12/19/2017       07:53     18:33     06:57     17:08     05:31     18:33
12/20/2017       08:38     19:24     06:57     17:08     05:31     18:34
12/21/2017       09:22     20:16     06:58     17:09     05:32     18:34
12/22/2017       10:02     21:09     06:58     17:09     05:32     18:35
12/23/2017       10:39     22:04     06:59     17:10     05:33     18:35
12/24/2017       11:16     22:59     06:59     17:10     05:33     18:36
12/25/2017       11:51     23:56     06:59     17:11     05:34     18:36
12/26/2017       12:26    ------     07:00     17:11     05:34     18:37
12/27/2017       13:03     00:54     07:00     17:12     05:35     18:38
12/28/2017       13:42     01:55     07:01     17:13     05:35     18:38
12/29/2017       14:25     02:59     07:01     17:13     05:35     18:39
12/30/2017       15:14     04:05     07:01     17:14     05:36     18:39
12/31/2017       16:09     05:13     07:02     17:15     05:36     18:40

Information and images in this section from The Sky6 Professional

Solar System Information

              Planet View Info Report for 12/ 1/2017 to 12/31/2017

                                    Mercury

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017  8:19 18:16   17h55m01s  -25°09'33"   19°58'03"   0.401    0.85849
12/ 8/2017  7:36 17:42   17h48m15s  -23°20'49"   11°13'41"   0.104    0.71786
12/15/2017  6:24 16:44   17h11m16s  -20°42'43"    5°06'08"   0.020    0.68354
12/22/2017  5:33 16:01   16h48m15s  -19°25'06"   17°28'31"   0.268    0.78366
12/29/2017  5:19 15:43   16h57m41s  -20°14'37"   22°11'01"   0.533    0.93517

                                     Venus

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017  6:00 16:30   15h49m58s  -19°19'20"    9°28'57"   0.987    1.67786
12/ 8/2017  6:15 16:34   16h26m39s  -21°13'04"    7°45'55"   0.991    1.68838
12/15/2017  6:28 16:41   17h04m10s  -22°36'41"    6°03'40"   0.995    1.69689
12/22/2017  6:41 16:49   17h42m19s  -23°27'05"    4°22'28"   0.997    1.70336
12/29/2017  6:53 17:00   18h20m47s  -23°42'15"    2°43'07"   0.999    1.70784

                                      Mars

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017  3:15 14:38   13h33m14s   -8°36'00"   44°14'54"   0.955    2.20790
12/ 8/2017  3:08 14:23   13h49m50s  -10°12'24"   46°56'49"   0.950    2.15472
12/15/2017  3:01 14:09   14h06m36s  -11°45'24"   49°39'58"   0.945    2.09922
12/22/2017  2:54 13:55   14h23m31s  -13°14'26"   52°24'19"   0.940    2.04152
12/29/2017  2:47 13:41   14h40m35s  -14°38'58"   55°09'36"   0.935    1.98187

                                    Jupiter

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017  4:31 15:26   14h35m52s  -14°10'46"   27°55'34"   0.998    6.28721
12/ 8/2017  4:10 15:03   14h41m27s  -14°36'31"   33°36'18"   0.997    6.22767
12/15/2017  3:49 14:40   14h46m52s  -15°00'50"   39°20'49"   0.997    6.15891
12/22/2017  3:27 14:17   14h52m06s  -15°23'34"   45°09'26"   0.996    6.08142
12/29/2017  3:05 13:53   14h57m05s  -15°44'36"   51°02'16"   0.995    5.99593

                                     Saturn

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017  8:06 18:18   17h50m01s  -22°28'28"   18°44'22"   1.000   11.01238
12/ 8/2017  7:42 17:54   17h53m30s  -22°29'46"   12°27'23"   1.000   11.04333
12/15/2017  7:18 17:30   17h57m03s  -22°30'43"    6°11'36"   1.000   11.06182
12/22/2017  6:54 17:06   18h00m37s  -22°31'19"    0°55'42"   1.000   11.06754
12/29/2017  6:30 16:42   18h04m11s  -22°31'32"    6°32'50"   1.000   11.06039

                                     Uranus

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017 14:30  3:21    1h33m34s    9°07'56"  136°01'12"   1.000   19.18645
12/ 8/2017 14:02  2:53    1h32m56s    9°04'32"  128°45'25"   1.000   19.27555
12/15/2017 13:34  2:25    1h32m27s    9°01'55"  121°30'51"   1.000   19.37409
12/22/2017 13:07  1:57    1h32m06s    9°00'09"  114°17'52"   0.999   19.48055
12/29/2017 12:39  1:29    1h31m55s    8°59'18"  107°07'06"   0.999   19.59314

                                    Neptune

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017 12:31  0:00   22h53m08s   -8°06'22"   92°30'35"   1.000   29.88611
12/ 8/2017 12:04 23:29   22h53m18s   -8°05'08"   85°27'35"   1.000   30.00725
12/15/2017 11:37 23:02   22h53m35s   -8°03'16"   78°25'18"   1.000   30.12728
12/22/2017 11:09 22:35   22h53m58s   -8°00'46"   71°23'56"   1.000   30.24441
12/29/2017 10:42 22:08   22h54m26s   -7°57'41"   64°23'52"   1.000   30.35681

                                     Pluto

Date       Rise  Set     RA         Dec         Elongation   Ill Fr  DIST(AU)

12/ 1/2017  9:30 19:46   19h16m52s  -21°45'02"   38°49'36"   1.000   34.21873
12/ 8/2017  9:04 19:19   19h17m45s  -21°44'08"   31°55'51"   1.000   34.29269
12/15/2017  8:37 18:53   19h18m40s  -21°43'06"   25°01'54"   1.000   34.35449
12/22/2017  8:10 18:26   19h19m38s  -21°41'58"   18°07'52"   1.000   34.40322
12/29/2017  7:44 18:00   19h20m38s  -21°40'44"   11°14'07"   1.000   34.43821


                         Planet Apsides Report for 2017

Mercury
  12/12/2017  Perihelion   Distance from Sun:   0.31 AU


       Planet Conjunction/Opposition Report for 12/ 1/2017 to 12/31/2017

Mercury

  Date        Hour   Event

  12/12/2017  20     Inferior Conjunction               

Saturn

  Date        Hour   Event

  12/21/2017  18     Conjunction                        


                               Planet Data Report

Planet       Mean Dist   Period of          Inclination     Equatorial
             From Sun    Revolution                         Diameter
             (AU)                                           (km)

Mercury       0.39        88    days         7°               4880
Venus         0.72       224.7  days         3.4°            12100
Earth         1.00       365.24 days         0°              12756
Mars          1.52       687    days         1.9°             6794
Jupiter       5.20        11.86 years        1.3°           143200
Saturn        9.54        29.46 years        2.5°           120000
Uranus       19.18        84    years        0.8°            52290
Neptune      30.06       165    years        1.8°            50450
Pluto        39.44       248    years       17.2°             2200-2300


                Moon Apsides Report for 12/ 1/2017 to 12/31/2017

Date          Hour    Apsis      Distance (km)    Diameter

12/ 4/2017     3      Perigee    357504           0.5571°
12/18/2017    19      Apogee     406601           0.4898°


                 Moon Nodes Report for 12/ 1/2017 to 12/31/2017

Date          Time     Node          Illuminated Fraction

12/ 7/2017    18:38    Ascending     0.77
12/22/2017     4:03    Descending    0.13


               Meteor Showers Report for 12/ 1/2017 to 12/31/2017

Date        Meteor Shower       ZHR  RA      DEC   Illum. Frac.  Longitude

12/ 8/2017  Puppids-Velids      15    9h00m  -48°  0.67          257°
12/13/2017  Geminids            75    7h28m   32°  0.18          262°
12/22/2017  Ursids               5   14h28m   78°  0.17          271°
12/25/2017  Puppids-Velids      15    9h20m  -65°  0.44          274°


                  Twilight Report for 12/ 1/2017 to 12/31/2017

Date         Sun            Astronomical   Nautical       Civil
             Rise   Set     Begin  End     Begin  End     Begin  End

12/ 1/2017    6:44  17:04    5:15  18:32    5:44  18:03    6:14  17:34
12/ 8/2017    6:50  17:04    5:20  18:34    5:49  18:04    6:19  17:35
12/15/2017    6:54  17:06    5:24  18:36    5:54  18:07    6:24  17:37
12/22/2017    6:58  17:09    5:28  18:39    5:57  18:10    6:27  17:40
12/29/2017    7:01  17:13    5:31  18:43    6:00  18:14    6:30  17:44

Information for this section is from Astronomy Lab 2.03

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Last updated on Friday, December 1, 2017, 01:31 PM.