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Monthly 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 Astronomy Lab 2 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.

NOTE: If you print this page out using your browser, be sure it is set to print black text or the background, or the white text will not print at all.

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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

Telescope line

July

Moon Calendar

Moon Calendar

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

                                                      Begin     End
  Date       Moonrise   Moonset   Sunrise   Sunset   Twilight  Twilight
------------ --------- --------- --------- --------- --------- ---------

7/1/2021         00:52     13:01     06:06     20:11     04:29     21:48
7/2/2021         01:21     13:55     06:07     20:11     04:30     21:48
7/3/2021         01:49     14:49     06:07     20:11     04:30     21:48
7/4/2021         02:17     15:43     06:07     20:11     04:31     21:47
7/5/2021         02:49     16:38     06:08     20:11     04:31     21:47
7/6/2021         03:24     17:34     06:08     20:10     04:32     21:47
7/7/2021         04:02     18:29     06:09     20:10     04:33     21:47
7/8/2021         04:46     19:24     06:09     20:10     04:33     21:46
7/9/2021         05:36     20:16     06:10     20:10     04:34     21:46
7/10/2021        06:30     21:04     06:10     20:10     04:35     21:45
7/11/2021        07:29     21:47     06:11     20:09     04:35     21:45
7/12/2021        08:29     22:26     06:11     20:09     04:36     21:44
7/13/2021        09:31     23:01     06:12     20:09     04:37     21:44
7/14/2021        10:31     23:35     06:12     20:08     04:38     21:43
7/15/2021        11:33    ------     06:13     20:08     04:38     21:43
7/16/2021        12:35     00:07     06:13     20:08     04:39     21:42
7/17/2021        13:38     00:39     06:14     20:07     04:40     21:42
7/18/2021        14:44     01:14     06:15     20:07     04:41     21:41
7/19/2021        15:53     01:53     06:15     20:06     04:42     21:40
7/20/2021        17:03     02:36     06:16     20:06     04:42     21:39
7/21/2021        18:12     03:28     06:16     20:06     04:43     21:39
7/22/2021        19:16     04:26     06:17     20:05     04:44     21:38
7/23/2021        20:13     05:32     06:17     20:04     04:45     21:37
7/24/2021        21:02     06:39     06:18     20:04     04:46     21:36
7/25/2021        21:43     07:46     06:19     20:03     04:47     21:35
7/26/2021        22:18     08:50     06:19     20:03     04:48     21:35
7/27/2021        22:50     09:52     06:20     20:02     04:49     21:34
7/28/2021        23:20     10:49     06:20     20:01     04:49     21:33
7/29/2021        23:49     11:46     06:21     20:01     04:50     21:32
7/30/2021       ------     12:40     06:22     20:00     04:51     21:31
7/31/2021        00:17     13:35     06:22     19:59     04:52     21:30

'------' means the event does not occur on this date.


Object       Right ascensio Declination   Azimuth       Altitude      Earth distance  Sun distance    
------------ -------------- ------------- ------------- ------------- --------------- --------------- 
Sun          07h 39m 04.4s  +21° 29' 04"  339° 43' 34"  -35° 21' 26"                0               0 
Mercury      06h 22m 13.7s  +22° 27' 42"    1° 46' 25"  -37° 04' 04"      161,268,190      49,390,747 
Venus        09h 38m 52.0s  +15° 47' 33"  308° 23' 27"  -24° 54' 21"      211,942,806     107,760,348 
Mars         09h 34m 29.0s  +15° 39' 40"  309° 07' 29"  -25° 44' 12"      373,193,045     249,220,317 
Jupiter      22h 14m 37.1s  -12° 02' 18"  119° 01' 32"  +21° 01' 43"      627,921,147     753,185,736 
Saturn       20h 56m 39.9s  -18° 03' 16"  138° 39' 40"  +29° 47' 30"    1,344,070,709   1,489,018,364 
Uranus       02h 47m 44.7s  +15° 43' 45"   57° 01' 43"  -19° 40' 46"    3,005,882,415   2,953,987,482 
Neptune      23h 36m 28.0s  -03° 47' 17"   99° 56' 37"  +09° 11' 03"    4,398,860,498   4,476,481,486 
Pluto        19h 51m 38.9s  -22° 33' 25"  156° 51' 30"  +33° 20' 50"    4,982,584,903   5,134,432,067 
Moon         11h 44m 55.3s  +06° 12' 59"  280° 54' 50"  -06° 07' 01"          380,006               0 

Object       Rise:  Tran  Set: Phase   Constl    Magnitud 
------------ ----- ----- ----- ------- --------- -------- 
Sun          05:13 12:11 19:09   0.00%       Gem  unknown 
Mercury      03:53 10:52 17:52  66.69%       Gem     -0.6 
Venus        07:28 14:10 20:52  86.58%       Leo     -3.9 
Mars         07:26 14:07 20:47  97.92%       Leo      1.8 
Jupiter      21:13 02:46 08:23  99.61%       Aqr     -2.8 
Saturn       20:10 01:28 06:50  99.97%       Cap      0.3 
Uranus       00:42 07:22 14:02  99.94%       Ari      5.8 
Neptune      22:14 04:07 10:04  99.98%       Aqr      7.9 
Pluto        19:16 00:22 05:31 100.00%       Sgr     14.3 
Moon         09:31 16:06 22:34  26.45%       Vir  unknown 

Moon Data
---------
Distance (km):                380,005.8
Distance (miles):             236,125.2
True Equatorial:              11h 48m 11.3s +06° 43' 01" 
Angular diameter:               0° 31' 24" 
Total libration (l,b):          5° 21' 28"  ,  6° 26' 40" 
Optical libration:              5° 20' 40"  ,  6° 28' 14" 
Physical libration:             0° 00' 48"  ,  0° 01' 34" 
Position Angle:                23° 01' 41" 
Pos. angle (bright limb):     118° 05' 41" 
Phase angle:                   23° 01' 41" 
Age:                          5.15

Mars Data
---------
Declination of earth:          21° 11' 50" 
Declination of Sun:            23° 53' 58" 
Longitude of the central Meridian:149° 44' 23" 
Pos. Angle:                     3° 44' 31" 

Jupiter Data
-----------------
Declination of earth:           0° 48' 21" 
Declination of Sun:             0° 21' 14" 
Longitude of the central Meridian: 38° 30' 05" 
Pos. Angle:                   336° 54' 28" 

Saturn Data
---------
Declination of earth:          17° 39' 22" 
Declination of Sun:            18° 18' 08" 
Longitude of the central Meridian:  0° 00' 00" 
Pos. Angle:                     6° 42' 28" 


Name                          Month/Day    RA         Decl       Hourly Rate
----------------------------- ------------ ---------- ---------- -----------
Epsilon Pegasids                   07/09        22.7       15.0         8
July Phoenicids                    07/14         2.1      -47.9        30
Omicron Draconids                  07/16        18.1       59.0         3
Capricornids                       07/22        20.9      -23.0         4
Southern Delta Aquarids            07/29        22.2      -16.5        30
Alpha Capricornids                 07/30        20.5      -10.0        30

Information for this section is from TheSkyX Student Edition

              Planet View Info Report for  7/ 1/2021 to  7/31/2021

                                    Mercury

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

 7/ 1/2021  4:49 18:30    5h12m12s   19°14'23"   21°00'49"   0.274    0.76481
 7/ 8/2021  4:44 18:35    5h38m41s   20°54'04"   21°11'19"   0.451    0.91155
 7/15/2021  4:55 18:56    6h20m47s   22°25'58"   17°58'08"   0.661    1.07325
 7/22/2021  5:23 19:26    7h16m18s   22°46'57"   11°53'55"   0.867    1.22107
 7/29/2021  6:03 19:55    8h18m29s   21°07'26"    4°20'40"   0.985    1.31809

                                     Venus

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

 7/ 1/2021  8:04 21:52    8h29m33s   20°41'06"   25°17'03"   0.899    1.49239
 7/ 8/2021  8:17 21:52    9h04m16s   18°28'50"   27°04'45"   0.883    1.45626
 7/15/2021  8:30 21:51    9h37m55s   15°52'29"   28°50'49"   0.866    1.41790
 7/22/2021  8:43 21:49   10h10m30s   12°56'10"   30°34'59"   0.849    1.37744
 7/29/2021  8:55 21:45   10h42m09s    9°44'00"   32°16'50"   0.830    1.33512

                                      Mars

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

 7/ 1/2021  8:39 22:13    8h59m21s   18°22'58"   32°38'15"   0.972    2.42856
 7/ 8/2021  8:32 21:59    9h16m46s   17°05'17"   30°18'30"   0.976    2.46265
 7/15/2021  8:25 21:45    9h34m00s   15°42'11"   27°59'23"   0.979    2.49381
 7/22/2021  8:18 21:31    9h51m02s   14°14'09"   25°40'54"   0.982    2.52198
 7/29/2021  8:11 21:16   10h07m55s   12°41'40"   23°22'52"   0.985    2.54719

                                    Jupiter

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

 7/ 1/2021 23:06 10:17   22h17m21s  -11°42'54"  127°25'33"   0.994    4.35649
 7/ 8/2021 22:37  9:48   22h16m13s  -11°51'18"  134°24'30"   0.995    4.27334
 7/15/2021 22:08  9:18   22h14m31s  -12°02'48"  141°32'26"   0.996    4.19964
 7/22/2021 21:39  8:48   22h12m17s  -12°17'01"  148°48'25"   0.997    4.13678
 7/29/2021 21:10  8:17   22h09m37s  -12°33'30"  156°11'35"   0.998    4.08585

                                     Saturn

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

 7/ 1/2021 22:04  8:45   21h00m20s  -17°46'24"  146°59'35"   0.999    9.10628
 7/ 8/2021 21:35  8:15   20h58m41s  -17°54'10"  154°04'42"   1.000    9.04864
 7/15/2021 21:06  7:46   20h56m51s  -18°02'35"  161°12'29"   1.000    9.00402
 7/22/2021 20:37  7:16   20h54m53s  -18°11'25"  168°21'57"   1.000    8.97319
 7/29/2021 20:08  6:46   20h52m50s  -18°20'26"  175°31'02"   1.000    8.95658

                                     Uranus

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

 7/ 1/2021  2:32 15:51    2h45m51s   15°35'27"   55°36'20"   1.000   20.30646
 7/ 8/2021  2:05 15:24    2h46m50s   15°39'51"   62°01'51"   0.999   20.20545
 7/15/2021  1:38 14:58    2h47m42s   15°43'39"   68°29'30"   0.999   20.09811
 7/22/2021  1:11 14:31    2h48m26s   15°46'47"   74°59'20"   0.999   19.98589
 7/29/2021  0:44 14:04    2h49m00s   15°49'17"   81°31'43"   0.999   19.87020

                                    Neptune

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

 7/ 1/2021  0:10 11:56   23h36m49s   -3°44'20"  106°11'56"   1.000   29.62440
 7/ 8/2021 23:38 11:28   23h36m43s   -3°45'24"  112°54'21"   1.000   29.51343
 7/15/2021 23:11 11:00   23h36m30s   -3°47'04"  119°38'27"   1.000   29.40793
 7/22/2021 22:43 10:32   23h36m12s   -3°49'18"  126°24'03"   1.000   29.30946
 7/29/2021 22:15 10:04   23h35m49s   -3°52'03"  133°11'20"   1.000   29.21937

                                     Pluto

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

 7/ 1/2021 21:10  7:25   19h53m03s  -22°28'19"  163°22'36"   1.000   33.33670
 7/ 8/2021 20:42  6:57   19h52m23s  -22°30'51"  170°09'42"   1.000   33.31455
 7/15/2021 20:14  6:29   19h51m41s  -22°33'24"  176°43'44"   1.000   33.30652
 7/22/2021 19:45  6:00   19h50m58s  -22°35'55"  175°43'21"   1.000   33.31279
 7/29/2021 19:17  5:32   19h50m16s  -22°38'21"  169°03'31"   1.000   33.33327


                         Planet Apsides Report for 2021

Earth
   7/ 4/2021  Aphelion     Distance from Sun:   1.02 AU

Mercury
   7/23/2021  Perihelion   Distance from Sun:   0.31 AU

Mars
   7/12/2021  Aphelion     Distance from Sun:   1.67 AU


       Planet Conjunction/Opposition Report for  7/ 1/2021 to  7/31/2021

Pluto

  Date        Hour   Event

   7/17/2021  18     Opposition                         

   
                               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  7/ 1/2021 to  7/31/2021

Date          Hour    Apsis      Distance (km)    Diameter

 7/ 5/2021    10      Apogee     405356           0.4913°
 7/21/2021     5      Perigee    364518           0.5464°


                 Moon Nodes Report for  7/ 1/2021 to  7/31/2021

Date          Time     Node          Illuminated Fraction

 7/ 6/2021    17:40    Ascending     0.10
 7/20/2021     8:21    Descending    0.81


               Meteor Showers Report for  7/ 1/2021 to  7/31/2021

Date        Meteor Shower       ZHR  RA      DEC   Illum. Frac.  Longitude

 7/ 7/2021  Capricornids         5                 0.05          106°
 7/15/2021  Capricornids         5   20h44m  -15°  0.32          113°
 7/20/2021  alpha-Cygnids        5   21h00m   48°  0.85          118°
 7/25/2021  Capricornids         5   21h00m  -15°  0.96          123°
 7/28/2021  delta-Aquarids      20   22h36m  -17°  0.76          126°
 7/30/2021  Piscis Australids    5   22h40m  -30°  0.57          128°


                  Twilight Report for  7/ 1/2021 to  7/31/2021

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

 7/ 1/2021    6:06  20:11    4:25  21:52    5:01  21:16    5:35  20:43
 7/ 8/2021    6:09  20:10    4:30  21:50    5:05  21:15    5:38  20:42
 7/15/2021    6:13  20:08    4:35  21:47    5:09  21:12    5:42  20:39
 7/22/2021    6:17  20:05    4:40  21:42    5:14  21:08    5:46  20:36
 7/29/2021    6:21  20:01    4:47  21:36    5:20  21:02    5:51  20:31

Information for this section is from Astronomy Lab 2.03


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