Swift MOC
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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 2022
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
33315.57-16.8846.8856.6586.3273.3099.33
34316.58-16.5947.8870.8686.5073.6999.31
35317.60-16.3048.8984.6886.6874.0799.29
36318.60-16.0049.8998.0686.8574.4399.27
37319.61-15.6950.90111.0387.0274.7899.26
38320.61-15.3851.91123.6087.1875.1199.25
39321.61-15.0752.91135.8487.3475.4399.25
40322.61-14.7553.92147.8487.4975.7499.25
41323.60-14.4354.92159.6487.6476.0399.25
42324.59-14.1055.93171.1287.7976.3299.26
43325.57-13.7756.93175.2387.9376.5999.27
44326.55-13.4457.93164.2188.0776.8699.28
45327.53-13.1058.94152.3088.2177.1299.30
46328.51-12.7659.94140.1288.3477.3699.31
47329.48-12.4260.95127.7088.4777.6099.34
48330.45-12.0761.95115.0588.6077.8399.36
49331.42-11.7262.95102.1588.7278.0699.39
50332.38-11.3663.9589.0488.8578.2799.42
51333.34-11.0164.9675.7388.9778.4899.45
52334.30-10.6565.9662.2489.0978.6899.49
53335.26-10.2866.9648.5889.2078.8899.53
54336.21-9.9267.9634.7889.3279.0799.57
55337.16-9.5568.9620.8789.4379.2599.61
56338.11-9.1869.967.1889.5479.4399.66
57339.05-8.8170.968.3589.6679.6199.70
58340.00-8.4371.9622.3389.7679.7799.76
59340.94-8.0672.9636.6189.8779.9499.81
60341.88-7.6873.9650.8889.9880.0999.86
61342.82-7.3074.9665.0290.0980.2599.92
62343.75-6.9275.9678.9590.1980.4099.98
63344.69-6.5376.9692.5890.2980.54100.05
64345.62-6.1577.96105.8790.4080.68100.11
65346.55-5.7678.95118.8190.5080.82100.18
66347.47-5.3779.95131.4090.6080.95100.25
67348.40-4.9880.95143.6990.7081.08100.32
68349.32-4.5981.94155.7190.8081.21100.40
69350.25-4.2082.94167.4690.9081.33100.47
70351.17-3.8183.93177.0591.0081.45100.55
71352.09-3.4184.93168.1491.1081.56100.64
72353.01-3.0285.92156.3991.2081.67100.72
73353.92-2.6386.91144.3591.2981.78100.81
74354.84-2.2387.90132.0591.3981.89100.90
75355.76-1.8488.90119.4591.4981.99100.99
76356.67-1.4489.89106.5491.5982.09101.09
77357.58-1.0590.8893.3291.6882.18101.18
78358.50-0.6591.8779.8191.7882.28101.29
79359.41-0.2692.8666.0691.8882.37101.39
800.320.1493.8452.1291.9882.45101.50
811.230.5394.8338.0692.0782.54101.61
822.140.9395.8223.9792.1782.62101.72
833.051.3296.8110.0392.2782.70101.84
843.961.7297.795.3492.3782.78101.96
854.872.1198.7818.8792.4782.85102.08
865.782.5099.7732.8492.5782.93102.21
876.692.89100.7546.7792.6783.00102.34
887.603.28101.7460.6092.7783.06102.47
898.523.67102.7274.2892.8783.13102.61
909.434.06103.7087.7892.9783.19102.75
9110.344.45104.69101.0693.0783.25102.89
9211.254.83105.67114.0893.1883.31103.04
9312.165.22106.65126.8493.2883.37103.20
9413.085.60107.63139.3293.3983.42103.36
9513.995.98108.61151.5593.4983.47103.52
9614.906.36109.59163.5193.6083.52103.69
9715.826.74110.57174.8793.7183.56103.86
9816.737.12111.55172.0293.8283.61104.04
9917.657.49112.53160.4793.9383.65104.22
10018.577.86113.50148.6294.0583.69104.41
10119.498.23114.48136.5594.1683.72104.60
10220.418.60115.46124.2294.2883.76104.80
10321.338.96116.43111.5694.4083.79105.01
10422.259.32117.4098.5294.5283.82105.22
10523.179.68118.3885.1094.6483.84105.44
10624.1010.04119.3571.2994.7683.87105.66
10725.0310.39120.3257.1694.8983.89105.90
10825.9510.74121.2942.7895.0283.90106.14
10926.8811.09122.2628.2895.1583.92106.39
11027.8211.44123.2413.8295.2983.93106.65
11128.7511.78124.202.8395.4383.94106.91
11229.6912.12125.1715.6095.5783.95107.19
11330.6212.45126.1429.7095.7183.95107.48
11431.5612.78127.1143.6595.8683.95107.77
11532.5013.11128.0857.3996.0183.94108.08
11633.4513.44129.0470.9296.1783.94108.40
11734.3913.76130.0184.2396.3383.92108.73
11835.3414.08130.9797.3396.4983.91109.07
11936.2914.39131.94110.2296.6683.89109.43
12037.2414.70132.90122.9096.8483.87109.80
12138.2015.01133.86135.3897.0283.84110.19
12239.1515.31134.83147.6697.2083.81110.60
12340.1115.61135.79159.7397.3983.77111.02
12441.0715.90136.75171.4797.5983.73111.46
12542.0416.19137.71175.4097.8083.68111.92
12643.0016.47138.67164.1998.0183.63112.39
12743.9716.75139.62152.4598.2383.57112.90
12844.9417.03140.58140.5898.4683.50113.42
12945.9117.30141.54128.5498.7083.43113.97
13046.8917.56142.49116.2498.9583.35114.55
13147.8617.82143.44103.6199.2183.26115.16
13248.8418.08144.4090.5999.4883.17115.80
13349.8218.33145.3577.1299.7783.06116.48
13450.8118.57146.3063.20100.0782.95117.19
13551.7918.81147.2548.87100.3882.82117.94
13652.7819.05148.2034.21100.7182.69118.74
13753.7719.28149.1419.37101.0682.54119.58
13854.7719.50150.094.96101.4382.38120.48
13955.7619.72151.0311.04101.8282.20121.43
14056.7619.93151.9725.60102.2382.02122.45
14157.7620.14152.9140.00102.6781.81123.54
14258.7620.34153.8554.09103.1481.58124.70
14359.7720.53154.7967.84103.6481.34125.95
14460.7720.72155.7281.24104.1881.07127.29
14561.7820.91156.6694.34104.7680.78128.73
14662.8021.09157.59107.17105.3880.46130.29
14763.8121.26158.51119.77106.0580.11131.99
14864.8221.42159.44132.16106.7879.73133.83
14965.8421.58160.36144.38107.5779.31135.84
15066.8621.73161.27156.42108.4478.85138.04
15167.8821.88162.19168.25109.4078.35140.45
15268.9122.02163.09177.30110.4577.79143.12
15369.9322.16163.99167.44111.6277.17146.07
15470.9622.28164.88155.77112.9376.49149.36
15571.9822.40165.77143.98114.3975.74153.03
15673.0122.52166.64132.08116.0474.92157.15
15774.0422.63167.50120.03117.9174.01161.81
15875.0722.73168.35107.75120.0573.01167.09
15976.1122.82169.1895.18122.5271.93173.11
16077.1422.91169.9882.24125.3870.78179.98
16178.1822.99170.7668.85128.7369.59187.87
16279.2123.07171.4955.00132.6668.43196.90
16380.2523.14172.1940.68137.3267.44207.19
16481.2823.20172.8225.98142.8266.84218.80
16582.3223.25173.3711.11149.3067.01231.60
16683.3623.30173.835.16156.8468.52245.17
16784.4023.34174.1619.81165.4072.06258.75
16885.4423.37174.3534.76174.7678.28271.24
16986.4823.40174.3849.45184.4987.45281.53
17087.5223.42174.2563.76194.0699.16288.96
17188.5623.43173.9877.65202.98112.43293.52
17289.6023.44173.5791.09210.94126.11295.77
17390.6423.44173.05104.14217.85139.29296.41
17491.6823.43172.45116.85223.73151.39296.07
17592.7223.41171.79129.28228.71162.22295.20
17693.7623.39171.07141.48232.92171.74294.09
17794.8023.36170.31153.51236.49180.07292.91
17895.8423.33169.52165.34239.53187.33291.74
17996.8723.29168.70176.31242.15193.67290.63
18097.9123.24167.86170.34244.42199.23289.60
18198.9523.18167.01158.74246.39204.12288.66
18299.9823.12166.15146.96248.12208.45287.80
183101.0223.05165.27135.09249.65212.29287.02
184102.0522.98164.39123.11251.02215.72286.31
185103.0822.89163.49110.97252.24218.80285.67
186104.1122.80162.6098.65253.33221.57285.09
187105.1422.71161.6986.06254.33224.08284.57
188106.1722.61160.7873.16255.23226.36284.09
189107.1922.50159.8759.88256.05228.44283.66
190108.2222.38158.9646.17256.80230.35283.26
191109.2422.26158.0432.02257.50232.10282.90
192110.2622.13157.1217.51258.14233.71282.57
193111.2822.00156.193.53258.73235.20282.27
194112.2921.86155.2713.09259.28236.58281.99
195113.3121.71154.3428.19259.80237.86281.74
196114.3221.56153.4143.28260.28239.06281.50
197115.3321.40152.4858.14260.73240.17281.29
198116.3421.23151.5472.62261.15241.22281.09
199117.3421.06150.6186.66261.55242.19280.91
200118.3520.88149.67100.23261.93243.11280.74
201119.3520.70148.74113.34262.28243.98280.59
202120.3520.51147.80126.05262.62244.79280.45
203121.3520.32146.86138.43262.94245.56280.32
204122.3420.12145.92150.55263.25246.29280.20
205123.3319.91144.98162.45263.54246.98280.09
206124.3219.70144.04173.93263.82247.64279.99
207125.3119.48143.10173.16264.08248.26279.90
208126.3019.26142.15161.67264.33248.85279.82
209127.2819.03141.21149.89264.58249.41279.74
210128.2618.80140.27138.00264.81249.95279.67
211129.2418.56139.32125.99265.03250.46279.61
212130.2118.32138.37113.84265.25250.95279.55
213131.1818.07137.43101.53265.46251.42279.50
214132.1517.82136.4889.04265.66251.86279.46
215133.1217.56135.5376.32265.85252.29279.42
216134.0917.30134.5863.35266.04252.70279.38
217135.0517.03133.6450.08266.22253.10279.35
218136.0116.76132.6936.48266.40253.47279.32
219136.9716.48131.7422.54266.57253.84279.30
220137.9216.20130.798.41266.74254.19279.28
221138.8715.92129.847.10266.90254.52279.27
222139.8215.63128.8921.70267.05254.85279.26
223140.7715.33127.9436.67267.21255.16279.25
224141.7115.04126.9851.63267.35255.46279.25
225142.6614.73126.0366.43267.50255.75279.25
226143.6014.43125.0880.93267.64256.03279.25
227144.5314.12124.1395.02267.78256.30279.26
228145.4713.81123.17108.67267.92256.57279.27
229146.4013.49122.22121.87268.05256.82279.28
230147.3313.17121.26134.63268.18257.06279.29
231148.2612.85120.31147.04268.31257.30279.31
232149.1912.52119.35159.14268.43257.53279.33
233150.1212.19118.40170.92268.55257.75279.35
234151.0411.85117.44176.08268.67257.97279.38
235151.9611.52116.48164.89268.79258.18279.41
236152.8811.18115.52153.13268.91258.38279.44
237153.8010.84114.56141.24269.02258.58279.47
238154.7210.49113.60129.20269.14258.77279.50
239155.6310.14112.64117.00269.25258.96279.54
240156.559.79111.68104.62269.36259.14279.58
241157.469.44110.7292.04269.47259.31279.62
242158.379.08109.7679.25269.57259.48279.67
243159.288.72108.8066.27269.68259.65279.72
244160.188.36107.8453.07269.79259.81279.77
245161.098.00106.8839.66269.89259.96279.82
246162.007.63105.9126.03269.99260.11279.87
247162.907.26104.9512.23270.09260.26279.93
248163.806.90103.983.12270.20260.41279.99
249164.706.52103.0216.67270.30260.55280.05
250165.606.15102.0631.14270.40260.68280.11
251166.505.78101.0945.75270.49260.81280.17
252167.405.40100.1260.36270.59260.94280.24
253168.305.0299.1674.86270.69261.07280.31
254169.204.6498.1989.14270.79261.19280.39
255170.104.2697.22103.11270.88261.31280.46
256170.993.8896.26116.71270.98261.42280.54
257171.893.5095.29129.90271.08261.54280.62
258172.793.1294.32142.70271.17261.65280.70
259173.682.7393.35155.14271.27261.75280.78
260174.582.3592.38167.23271.36261.86280.87
261175.471.9691.41177.74271.46261.96280.96
262176.371.5790.44168.53271.55262.05281.05
263177.271.1889.47156.81271.65262.15281.15
264178.160.8088.49144.97271.75262.24281.25
265179.060.4187.52132.99271.84262.33281.35
266179.960.0286.55120.84271.94262.42281.45
267180.86-0.3785.57108.45272.03262.50281.56
268181.76-0.7684.6095.81272.13262.59281.67
269182.66-1.1583.6282.92272.23262.67281.79
270183.56-1.5482.6569.77272.32262.75281.90
271184.46-1.9381.6756.39272.42262.82282.02
272185.36-2.3280.6942.82272.52262.89282.15
273186.26-2.7179.7229.09272.62262.96282.27
274187.17-3.1078.7415.26272.72263.03282.41
275188.07-3.4877.762.35272.82263.10282.54
276188.98-3.8776.7813.16272.92263.16282.68
277189.88-4.2675.8027.25273.02263.22282.82
278190.79-4.6474.8241.44273.12263.28282.97
279191.70-5.0373.8455.65273.23263.34283.12
280192.62-5.4172.8669.82273.33263.39283.28
281193.53-5.7971.8883.88273.44263.44283.44
282194.44-6.1770.9097.77273.55263.49283.60
283195.36-6.5569.92111.42273.66263.54283.77
284196.28-6.9368.93124.79273.77263.59283.95
285197.20-7.3167.95137.84273.88263.63284.13
286198.12-7.6866.97150.57273.99263.67284.31
287199.05-8.0565.98162.96274.11263.71284.51
288199.98-8.4365.00174.85274.22263.74284.71
289200.91-8.7964.01172.46274.34263.77284.91
290201.84-9.1663.03160.77274.46263.80285.12
291202.77-9.5362.04148.98274.59263.83285.34
292203.71-9.8961.06137.12274.71263.86285.57
293204.65-10.2560.07125.13274.84263.88285.80
294205.60-10.6159.08112.92274.97263.90286.04
295206.54-10.9658.09100.44275.10263.91286.29
296207.49-11.3257.1087.63275.24263.93286.55
297208.44-11.6756.1274.48275.38263.94286.82
298209.40-12.0155.1360.99275.52263.94287.10
299210.35-12.3654.1447.20275.67263.95287.39
300211.31-12.7053.1533.18275.82263.95287.69
301212.28-13.0352.1619.01275.97263.94288.00
302213.24-13.3751.175.01276.13263.94288.33
303214.21-13.7050.179.92276.30263.93288.67
304215.19-14.0349.1824.08276.46263.91289.02
305216.16-14.3548.1938.23276.64263.89289.38
306217.14-14.6747.2052.29276.82263.87289.76
307218.12-14.9846.2166.22277.00263.84290.16
Object in Sun Constraint

Swift Mission Operations Center

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State College, PA 16801
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📧 swiftods@swift.psu.edu

Swift MOC Team Leads

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