Monthly Observing Information
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.
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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.
July
Moon Calendar
Sky charts
Saturn’s Ring Plane
Venus Phase
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
