Swift MOC
Home Target of Opportunity Observations BAT XRT UVOT

Roll Angle / Visibility Calculator

This table shows the default roll angle, and allowed range around this default value (min and max roll angles) for a target of given decimal RA and declination (J2000) for an entire year. All values are calulated at 12:00UT for each day. Only periods where the source is far enough away from the Sun to be observed are included in this table.

For each day, the distance from the Moon at 12:00UT is given, where this value is highlighted in red, the source is too close to the Moon to observe at that time of day.

Note this table does show Pole constraints. Please note all values are estimates and will need to be validated by the Swift planners.

Note: RA/Dec/Year not set, using defaults. Enter values in form below.



Valid Roll Angles for target RA=266, Dec=-29 in 2023
Day of Year Sun RA (deg) Sun Dec (deg) Sun Distance (deg) Moon Distance (deg) Roll (deg) Min Roll (deg) Max Roll (deg)
Object in Sun Constraint
33315.32-16.9546.63174.3986.2773.2099.34
34316.34-16.6647.64162.7486.4673.6099.31
35317.35-16.3748.64150.9686.6473.9899.29
36318.36-16.0749.65139.1586.8174.3499.28
37319.36-15.7750.65127.3186.9874.6999.26
38320.37-15.4651.66115.4087.1475.0399.25
39321.36-15.1552.66103.4087.3075.3599.25
40322.36-14.8353.6791.2887.4575.6699.25
41323.35-14.5154.6779.0087.6175.9699.25
42324.34-14.1855.6866.5587.7576.2599.25
43325.33-13.8556.6853.8687.9076.5399.26
44326.31-13.5257.6940.8788.0476.7999.28
45327.29-13.1958.6927.5588.1777.0599.29
46328.27-12.8559.7013.8688.3177.3099.31
47329.24-12.5060.701.8088.4477.5499.33
48330.21-12.1561.7015.0788.5777.7899.36
49331.18-11.8062.7129.9088.6978.0099.38
50332.15-11.4563.7144.9888.8278.2299.41
51333.11-11.0964.7160.1388.9478.4399.44
52334.07-10.7465.7275.2089.0678.6499.48
53335.02-10.3766.7290.0189.1778.8399.52
54335.98-10.0167.72104.4589.2979.0299.56
55336.93-9.6468.72118.4489.4179.2199.60
56337.88-9.2769.72131.9589.5279.3999.65
57338.83-8.9070.72144.9989.6379.5699.69
58339.77-8.5371.72157.6189.7479.7399.74
59340.71-8.1572.72169.8689.8579.9099.80
60341.65-7.7773.72177.3489.9580.0699.85
61342.59-7.3974.72165.9290.0680.2199.91
62343.53-7.0175.72154.1390.1680.3699.97
63344.46-6.6376.72142.3490.2780.51100.03
64345.39-6.2477.71130.5190.3780.65100.09
65346.32-5.8578.71118.5990.4780.79100.16
66347.25-5.4779.71106.5590.5880.92100.23
67348.17-5.0880.7094.3790.6881.05100.30
68349.10-4.6981.7082.0290.7881.18100.38
69350.02-4.3082.6969.4990.8881.30100.45
70350.94-3.9183.6956.7790.9781.42100.53
71351.86-3.5184.6843.8591.0781.53100.61
72352.78-3.1285.6730.7191.1781.64100.70
73353.70-2.7286.6717.3491.2781.75100.79
74354.61-2.3387.663.9191.3781.86100.88
75355.53-1.9488.6510.4991.4781.96100.97
76356.45-1.5489.6424.6991.5682.06101.06
77357.36-1.1490.6339.1891.6682.16101.16
78358.27-0.7591.6253.8891.7682.25101.26
79359.19-0.3592.6168.6691.8582.34101.36
800.100.0493.6083.4291.9582.43101.47
811.010.4494.5998.0392.0582.52101.58
821.920.8395.58112.3692.1582.60101.69
832.831.2396.57126.3392.2582.68101.81
843.741.6297.56139.8892.3482.76101.93
854.652.0198.54153.0092.4482.84102.05
865.562.4199.53165.6992.5482.91102.18
876.472.80100.51177.6492.6482.98102.30
887.383.19101.50169.6292.7483.05102.44
898.303.58102.48157.7492.8483.11102.57
909.213.97103.47145.9292.9583.18102.71
9110.124.35104.45134.1193.0583.24102.86
9211.034.74105.43122.2393.1583.30103.01
9311.945.13106.41110.2493.2683.35103.16
9412.855.51107.3998.0793.3683.41103.32
9513.765.89108.3785.6993.4783.46103.48
9614.686.27109.3573.0893.5783.51103.64
9715.596.65110.3360.2393.6883.55103.81
9816.517.02111.3147.1693.7983.60103.99
9917.427.40112.2933.8793.9183.64104.17
10018.347.77113.2620.4094.0283.68104.36
10119.268.14114.246.8394.1383.71104.55
10220.188.51115.227.3094.2583.75104.75
10321.108.87116.1921.2094.3783.78104.95
10422.029.23117.1635.3094.4983.81105.16
10522.959.59118.1449.5494.6183.84105.38
10623.879.95119.1163.8594.7383.86105.61
10724.8010.31120.0978.2094.8683.88105.84
10825.7310.66121.0692.5094.9983.90106.08
10926.6611.01122.03106.6995.1283.92106.33
11027.5911.35123.00120.6895.2683.93106.58
11128.5211.70123.97134.3995.3983.94106.85
11229.4612.04124.94147.7995.5383.94107.12
11330.4012.37125.91160.8295.6883.95107.41
11431.3412.71126.88173.4495.8283.95107.70
11532.2813.04127.84173.8495.9783.94108.00
11633.2213.36128.81161.8096.1383.94108.32
11734.1713.68129.78149.8696.2983.93108.65
11835.1114.00130.74138.0196.4583.91108.99
11936.0614.32131.71126.1896.6283.89109.34
12037.0114.63132.67114.2896.7983.87109.71
12137.9714.93133.63102.2496.9783.85110.10
12238.9215.24134.5989.9997.1683.81110.50
12339.8815.53135.5577.4797.3583.78110.91
12440.8415.83136.5164.6497.5483.74111.35
12541.8016.12137.4751.5097.7583.69111.80
12642.7616.40138.4338.0797.9683.64112.27
12743.7316.68139.3924.3798.1883.58112.77
12844.7016.96140.3510.5098.4083.52113.29
12945.6717.23141.303.9598.6483.45113.84
13046.6517.50142.2617.9298.8983.37114.41
13147.6217.76143.2132.1299.1583.28115.01
13248.6018.01144.1646.3299.4283.19115.64
13349.5818.27145.1160.4999.7083.09116.31
13450.5718.51146.0774.5999.9982.98117.01
13551.5518.75147.0288.59100.3082.85117.75
13652.5418.99147.96102.48100.6382.72118.54
13753.5319.22148.91116.21100.9782.58119.37
13854.5319.45149.86129.76101.3482.42120.26
13955.5219.67150.80143.09101.7282.25121.20
14056.5219.88151.75156.17102.1382.06122.20
14157.5220.09152.69168.95102.5681.86123.27
14258.5220.29153.63177.82103.0381.64124.41
14359.5320.49154.57165.98103.5281.40125.64
14460.5320.68155.50153.90104.0581.14126.96
14561.5420.86156.43141.97104.6180.85128.37
14662.5521.04157.36130.12105.2280.54129.91
14763.5721.22158.29118.29105.8880.20131.57
14864.5821.38159.22106.40106.6079.83133.37
14965.6021.54160.1494.35107.3879.42135.34
15066.6221.70161.0582.08108.2378.97137.49
15167.6421.85161.9769.51109.1678.47139.85
15268.6621.99162.8756.58110.1977.93142.45
15369.6822.12163.7743.26111.3377.33145.33
15470.7122.25164.6729.56112.5976.66148.52
15571.7322.38165.5515.53114.0175.93152.09
15672.7622.49166.431.86115.6175.12156.10
15773.7922.60167.2913.49117.4374.24160.62
15874.8222.70168.1428.06119.5073.26165.73
15975.8522.80168.9842.63121.8872.20171.55
16076.8922.89169.7957.10124.6471.06178.21
16177.9222.97170.5771.40127.8569.88185.83
16278.9623.05171.3285.49131.6468.70194.57
16379.9923.12172.0299.33136.1067.65204.55
16481.0323.18172.67112.95141.3966.92215.85
16582.0723.24173.24126.33147.6366.86228.39
16683.1123.29173.73139.49154.9167.98241.84
16784.1523.33174.09152.43163.2470.97255.52
16885.1923.36174.32165.15172.4576.50268.40
16986.2323.39174.39177.31182.1484.97279.31
17087.2723.41174.30169.77191.8096.15287.45
17188.3123.43174.06157.67200.92109.17292.67
17289.3523.44173.68145.67209.14122.86295.41
17390.3923.44173.19133.79216.30136.22296.37
17491.4323.43172.60121.96222.42148.62296.22
17592.4723.42171.95110.14227.60159.76295.44
17693.5123.40171.2498.26231.98169.59294.37
17794.5523.37170.4986.24235.69178.18293.20
17895.5923.34169.7174.00238.85185.68292.02
17996.6223.30168.9061.45241.56192.23290.89
18097.6623.25168.0748.53243.90197.96289.84
18198.7023.20167.2235.18245.94203.00288.88
18299.7323.14166.3621.38247.73207.45288.00
183100.7723.07165.487.24249.30211.40287.20
184101.8023.00164.607.67250.70214.92286.48
185102.8322.91163.7122.44251.95218.08285.82
186103.8622.83162.8237.41253.08220.92285.23
187104.8922.73161.9152.38254.09223.49284.69
188105.9122.63161.0167.19255.02225.83284.20
189106.9422.52160.1081.75255.86227.95283.76
190107.9622.41159.1895.98256.63229.90283.35
191108.9922.29158.26109.85257.33231.68282.99
192110.0122.16157.34123.36257.99233.33282.65
193111.0322.03156.42136.55258.59234.85282.34
194112.0421.89155.49149.45259.15236.25282.06
195113.0621.75154.56162.09259.68237.56281.80
196114.0721.59153.63174.42260.17238.78281.56
197115.0921.44152.70172.95260.62239.91281.34
198116.0921.27151.77160.92261.05240.97281.14
199117.1021.10150.84148.94261.46241.97280.95
200118.1120.93149.90137.05261.84242.90280.78
201119.1120.75148.96125.22262.20243.78280.63
202120.1120.56148.02113.41262.54244.60280.48
203121.1120.36147.09101.59262.87245.39280.35
204122.1020.17146.1589.69263.18246.12280.23
205123.1019.96145.2177.66263.47246.82280.12
206124.0919.75144.2665.44263.75247.48280.02
207125.0819.53143.3252.94264.02248.11279.92
208126.0619.31142.3840.09264.27248.71279.84
209127.0419.09141.4426.82264.52249.28279.76
210128.0218.86140.4913.10264.76249.82279.69
211129.0018.62139.551.81264.98250.34279.62
212129.9818.38138.6015.91265.20250.83279.57
213130.9518.13137.6630.87265.41251.31279.51
214131.9217.88136.7146.06265.61251.76279.47
215132.8917.62135.7661.28265.81252.19279.43
216133.8517.36134.8276.39266.00252.60279.39
217134.8117.10133.8791.22266.18253.00279.36
218135.7716.82132.92105.68266.36253.38279.33
219136.7316.55131.97119.69266.53253.75279.31
220137.6916.27131.02133.26266.70254.10279.29
221138.6415.99130.07146.41266.86254.44279.27
222139.5915.70129.12159.19267.02254.77279.26
223140.5415.41128.17171.64267.17255.09279.25
224141.4815.11127.22175.78267.32255.39279.25
225142.4314.81126.26163.83267.47255.68279.25
226143.3714.50125.31151.88267.61255.97279.25
227144.3114.19124.36140.01267.75256.24279.25
228145.2413.88123.40128.18267.88256.50279.26
229146.1813.57122.45116.37268.02256.76279.27
230147.1113.25121.49104.54268.15257.01279.29
231148.0412.92120.5492.66268.28257.25279.31
232148.9712.60119.5880.69268.40257.48279.32
233149.9012.27118.6268.59268.52257.70279.35
234150.8211.93117.6756.31268.65257.92279.37
235151.7411.60116.7143.80268.76258.13279.40
236152.6611.26115.7530.99268.88258.33279.43
237153.5810.92114.7917.81269.00258.53279.46
238154.5010.57113.834.33269.11258.72279.50
239155.4110.23112.889.97269.22258.91279.53
240156.339.88111.9224.42269.33259.09279.57
241157.249.52110.9639.28269.44259.27279.61
242158.159.17110.0054.40269.55259.44279.66
243159.068.81109.0369.65269.66259.61279.70
244159.968.45108.0784.85269.76259.77279.75
245160.878.09107.1199.83269.86259.92279.80
246161.777.72106.15114.46269.97260.08279.86
247162.687.36105.19128.65270.07260.23279.91
248163.586.99104.22142.35270.17260.37279.97
249164.486.62103.26155.58270.27260.51280.03
250165.386.24102.29168.36270.37260.65280.09
251166.285.87101.33178.59270.47260.78280.16
252167.185.49100.36166.87270.57260.91280.23
253168.085.1299.40154.88270.67261.04280.30
254168.984.7498.43142.99270.76261.16280.37
255169.884.3697.46131.17270.86261.28280.44
256170.783.9896.49119.36270.96261.40280.52
257171.673.5995.52107.52271.05261.51280.60
258172.573.2194.5595.61271.15261.62280.68
259173.472.8293.5883.60271.25261.73280.76
260174.362.4492.6171.47271.34261.83280.85
261175.262.0591.6459.19271.44261.93280.94
262176.161.6690.6746.74271.53262.03281.03
263177.051.2889.7034.09271.63262.13281.13
264177.950.8988.7321.20271.72262.22281.23
265178.850.5087.758.05271.82262.31281.33
266179.740.1186.785.62271.91262.40281.43
267180.64-0.2885.8119.43272.01262.48281.54
268181.54-0.6784.8333.66272.11262.57281.65
269182.44-1.0683.8648.23272.20262.65281.76
270183.34-1.4582.8863.07272.30262.73281.87
271184.24-1.8481.9178.06272.40262.80281.99
272185.14-2.2280.9393.08272.50262.88282.12
273186.04-2.6179.95107.97272.59262.95282.24
274186.94-3.0078.98122.59272.69263.02282.37
275187.85-3.3978.00136.83272.79263.08282.51
276188.75-3.7877.02150.63272.89263.15282.64
277189.66-4.1676.04163.95273.00263.21282.79
278190.57-4.5575.06176.73273.10263.27282.93
279191.48-4.9374.08170.55273.20263.32283.08
280192.39-5.3273.10158.36273.31263.38283.24
281193.31-5.7072.12146.36273.41263.43283.40
282194.22-6.0871.14134.49273.52263.48283.56
283195.14-6.4670.16122.68273.63263.53283.73
284196.06-6.8469.17110.85273.74263.57283.90
285196.98-7.2268.1998.94273.85263.62284.08
286197.90-7.5967.2186.92273.96263.66284.27
287198.83-7.9666.2274.74274.08263.70284.46
288199.75-8.3465.2462.39274.19263.73284.66
289200.68-8.7164.2549.84274.31263.77284.86
290201.62-9.0763.2637.09274.43263.80285.07
291202.55-9.4462.2824.15274.56263.82285.29
292203.49-9.8061.2911.02274.68263.85285.51
293204.43-10.1660.302.57274.81263.87285.75
294205.37-10.5259.3216.00274.94263.89285.99
295206.32-10.8858.3329.80275.07263.91286.23
296207.26-11.2357.3443.85275.21263.92286.49
297208.21-11.5856.3558.12275.35263.93286.76
298209.17-11.9355.3672.58275.49263.94287.03
299210.12-12.2754.3787.16275.63263.95287.32
300211.08-12.6253.39101.77275.78263.95287.62
301212.04-12.9552.40116.32275.94263.95287.93
302213.01-13.2951.41130.68276.09263.94288.25
303213.98-13.6250.41144.76276.26263.93288.58
304214.95-13.9549.42158.48276.42263.92288.93
305215.92-14.2748.43171.79276.60263.90289.29
306216.90-14.5947.44175.12276.77263.88289.67
307217.88-14.9146.45162.61276.96263.85290.06
Object in Sun Constraint

Swift Mission Operations Center

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Swift MOC Team Leads

Mission Director: John Nousek
Science Operations: Jamie Kennea
Flight Operations: Mark Hilliard
UVOT: Michael Siegel
XRT: Jamie Kennea