Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ops/spst/lrpg/hst_sun_north_points Дата изменения: Mon Apr 13 20:29:45 2015 Дата индексирования: Sun Apr 10 19:45:07 2016 Кодировка: Поисковые слова: http astrokuban.info astrokuban

Historical data:
Times where RA of Sun is closest to RA of HST North Point

North-Point Sun RA Sun Dec HJD
---------------------------------------------------------------
At 1990.153:18 RA = 71.90 Dec = 22.40 4045.2
At 1990.202:09 RA = 122.37 Dec = 20.11 4093.9
At 1990.251:17 RA = 168.63 Dec = 4.89 4143.2
At 1990.301:02 RA = 213.97 Dec = -13.62 4192.6
At 1990.349:15 RA = 264.90 Dec = -23.36 4241.1

At 1991.032:23 RA = 316.49 Dec = -16.62 4289.5
At 1991.082:03 RA = 2.69 Dec = 1.17 4338.6
At 1991.131:06 RA = 48.74 Dec = 18.05 4387.8
At 1991.179:17 RA = 98.98 Dec = 23.18 4436.2
At 1991.228:10 RA = 147.18 Dec = 13.23 4484.9
At 1991.277:17 RA = 191.82 Dec = -5.08 4534.2
At 1991.326:11 RA = 239.45 Dec = -20.47 4583.0

At 1992.009:09 RA = 291.82 Dec = -21.93 4630.9
At 1992.057:22 RA = 340.30 Dec = -8.32 4679.4
At 1992.106:22 RA = 25.17 Dec = 10.45 4728.4
At 1992.155:11 RA = 73.17 Dec = 22.54 4777.0
At 1992.203:15 RA = 123.13 Dec = 19.96 4825.1
At 1992.252:11 RA = 168.87 Dec = 4.78 4874.0
At 1992.301:11 RA = 213.87 Dec = -13.58 4923.0
At 1992.349:13 RA = 264.27 Dec = -23.34 4971.0

At 1993.031:11 RA = 315.50 Dec = -16.90 5019.0
At 1993.080:05 RA = 1.42 Dec = 0.62 5067.7
At 1993.129:00 RA = 47.02 Dec = 17.60 5116.5
At 1993.177:04 RA = 96.85 Dec = 23.29 5164.7
At 1993.225:13 RA = 144.97 Dec = 13.97 5213.0
At 1993.274:12 RA = 189.37 Dec = -4.04 5262.0
At 1993.323:01 RA = 236.40 Dec = -19.86 5310.5

At 1994.005:22 RA = 288.66 Dec = -22.33 5358.4
At 1994.054:09 RA = 337.47 Dec = -9.43 5406.9
At 1994.103:10 RA = 22.40 Dec = 9.38 5455.9
At 1994.152:01 RA = 70.15 Dec = 22.19 5504.5
At 1994.200:06 RA = 120.28 Dec = 20.53 5552.8
At 1994.249:03 RA = 166.34 Dec = 5.85 5601.6
At 1994.298:05 RA = 211.23 Dec = -12.67 5650.7
At 1994.346:10 RA = 261.39 Dec = -23.20 5698.9

At 1995.029:10 RA = 312.96 Dec = -17.60 5746.9
At 1995.078:06 RA = 359.20 Dec = -0.35 5795.8
At 1995.127:04 RA = 44.75 Dec = 16.97 5844.7
At 1995.175:11 RA = 94.54 Dec = 23.37 5893.0
At 1995.223:22 RA = 142.99 Dec = 14.63 5941.4
At 1995.273:00 RA = 187.57 Dec = -3.27 5990.5
At 1995.321:18 RA = 234.54 Dec = -19.45 6039.2

At 1996.004:15 RA = 286.75 Dec = -22.55 6087.1
At 1996.053:00 RA = 335.72 Dec = -10.11 6135.5
At 1996.102:00 RA = 20.64 Dec = 8.69 6184.5
At 1996.150:15 RA = 68.18 Dec = 21.92 6233.1
At 1996.198:20 RA = 118.38 Dec = 20.88 6281.3
At 1996.247:15 RA = 164.55 Dec = 6.59 6330.1
At 1996.296:16 RA = 209.29 Dec = -11.97 6379.2
At 1996.344:22 RA = 259.20 Dec = -23.07 6427.4

At 1997.026:21 RA = 310.91 Dec = -18.14 6475.4
At 1997.075:20 RA = 357.48 Dec = -1.09 6524.3
At 1997.125:02 RA = 43.22 Dec = 16.53 6573.6
At 1997.173:16 RA = 93.19 Dec = 23.41 6622.2
At 1997.222:10 RA = 142.07 Dec = 14.92 6670.9
At 1997.271:19 RA = 186.95 Dec = -3.00 6720.3
At 1997.320:19 RA = 234.08 Dec = -19.35 6769.3

At 1998.004:00 RA = 286.63 Dec = -22.56 6817.5
At 1998.052:16 RA = 335.89 Dec = -10.04 6866.2
At 1998.101:23 RA = 21.08 Dec = 8.86 6915.5
At 1998.150:20 RA = 68.93 Dec = 22.03 6964.3
At 1998.199:08 RA = 119.40 Dec = 20.69 7012.8
At 1998.248:11 RA = 165.76 Dec = 6.09 7062.0
At 1998.297:18 RA = 210.82 Dec = -12.52 7111.2
At 1998.346:05 RA = 261.19 Dec = -23.19 7159.7

At 1999.029:11 RA = 313.04 Dec = -17.58 7208.0
At 1999.078:12 RA = 359.46 Dec = -0.23 7257.0
At 1999.127:16 RA = 45.27 Dec = 17.12 7306.2
At 1999.176:03 RA = 95.27 Dec = 23.35 7354.6
At 1999.224:19 RA = 143.84 Dec = 14.35 7403.3
At 1999.274:01 RA = 188.55 Dec = -3.69 7452.5
At 1999.322:22 RA = 235.79 Dec = -19.73 7501.4

At 2000.005:22 RA = 288.18 Dec = -22.39 7549.4
At 2000.054:11 RA = 337.12 Dec = -9.57 7598.0
At 2000.103:13 RA = 22.09 Dec = 9.26 7647.0
At 2000.152:04 RA = 69.81 Dec = 22.14 7695.7
At 2000.200:09 RA = 119.95 Dec = 20.59 7743.9
At 2000.249:05 RA = 166.00 Dec = 5.99 7792.7
At 2000.298:05 RA = 210.79 Dec = -12.51 7841.7
At 2000.346:09 RA = 260.84 Dec = -23.17 7889.9

At 2001.028:06 RA = 312.33 Dec = -17.77 7937.8
At 2001.076:22 RA = 358.49 Dec = -0.66 7986.4
At 2001.125:17 RA = 43.86 Dec = 16.72 8035.2
At 2001.173:19 RA = 93.35 Dec = 23.40 8083.3
At 2001.222:01 RA = 141.74 Dec = 15.03 8131.5
At 2001.270:21 RA = 186.15 Dec = -2.66 8180.4
At 2001.319:09 RA = 232.65 Dec = -19.02 8228.9

At 2002.001:23 RA = 284.46 Dec = -22.77 8276.5
At 2002.049:22 RA = 333.32 Dec = -11.02 8324.4
At 2002.098:14 RA = 18.00 Dec = 7.63 8373.1
At 2002.146:22 RA = 64.91 Dec = 21.44 8421.4
At 2002.194:18 RA = 114.82 Dec = 21.48 8469.2
At 2002.243:04 RA = 161.01 Dec = 8.03 8517.7
At 2002.291:20 RA = 205.22 Dec = -10.47 8566.3
At 2002.339:18 RA = 254.12 Dec = -22.64 8614.2

At 2003.022:06 RA = 305.71 Dec = -19.40 8661.8
At 2003.070:12 RA = 352.21 Dec = -3.36 8710.0
At 2003.119:01 RA = 36.94 Dec = 14.60 8758.5
At 2003.166:23 RA = 85.62 Dec = 23.38 8806.5
At 2003.214:19 RA = 134.37 Dec = 17.22 8854.3
At 2003.263:08 RA = 178.92 Dec = 0.47 8902.8
At 2003.311:17 RA = 224.33 Dec = -16.85 8951.2
At 2003.359:04 RA = 275.32 Dec = -23.35 8998.7

At 2004.041:21 RA = 325.13 Dec = -13.92 9046.4
At 2004.090:07 RA = 9.97 Dec = 4.29 9094.8
At 2004.138:13 RA = 55.88 Dec = 19.74 9143.0
At 2004.186:05 RA = 105.62 Dec = 22.66 9190.7
At 2004.234:07 RA = 152.47 Dec = 11.33 9238.8
At 2004.282:20 RA = 196.38 Dec = -6.97 9287.3
At 2004.330:19 RA = 243.90 Dec = -21.27 9335.3

At 2005.012:03 RA = 295.65 Dec = -21.35 9382.6
At 2005.060:03 RA = 343.14 Dec = -7.17 9430.6
At 2005.108:14 RA = 27.52 Dec = 11.33 9479.1
At 2005.156:12 RA = 75.15 Dec = 22.74 9527.0
At 2005.204:04 RA = 124.51 Dec = 19.66 9574.7
At 2005.252:12 RA = 169.67 Dec = 4.45 9623.0
At 2005.300:22 RA = 214.17 Dec = -13.69 9671.4
At 2005.348:12 RA = 264.06 Dec = -23.33 9719.0

At 2006.030:22 RA = 314.81 Dec = -17.10 9766.4
At 2006.079:04 RA = 0.34 Dec = 0.15 9814.7
At 2006.127:12 RA = 45.40 Dec = 17.16 9863.0
At 2006.175:04 RA = 94.58 Dec = 23.37 9910.7
At 2006.223:01 RA = 142.49 Dec = 14.79 9958.5
At 2006.271:12 RA = 186.52 Dec = -2.82 10007.0
At 2006.319:15 RA = 232.69 Dec = -19.03 10055.1

At 2007.001:23 RA = 284.23 Dec = -22.79 10102.5
At 2007.049:17 RA = 332.92 Dec = -11.16 10150.2
At 2007.098:02 RA = 17.34 Dec = 7.36 10198.6
At 2007.146:04 RA = 63.92 Dec = 21.28 10246.7
At 2007.193:18 RA = 113.59 Dec = 21.67 10294.2
At 2007.241:22 RA = 159.69 Dec = 8.56 10342.4
At 2007.290:08 RA = 203.61 Dec = -9.85 10390.8
At 2007.338:03 RA = 252.12 Dec = -22.42 10438.6

At 2008.020:10 RA = 303.59 Dec = -19.86 10485.9
At 2008.068:12 RA = 350.18 Dec = -4.23 10534.0
At 2008.116:21 RA = 34.66 Dec = 13.85 10582.4
At 2008.164:16 RA = 82.98 Dec = 23.28 10630.2
At 2008.212:09 RA = 131.83 Dec = 17.90 10677.9
At 2008.260:17 RA = 176.38 Dec = 1.57 10726.2
At 2008.309:00 RA = 221.40 Dec = -16.00 10774.5
At 2008.356:10 RA = 272.04 Dec = -23.43 10821.9

At 2009.037:23 RA = 322.07 Dec = -14.92 10869.5
At 2009.086:06 RA = 7.02 Dec = 3.03 10917.8
At 2009.134:11 RA = 52.57 Dec = 19.00 10966.0
At 2009.182:01 RA = 102.11 Dec = 22.97 11013.5
At 2009.230:00 RA = 149.24 Dec = 12.50 11061.5
At 2009.278:10 RA = 193.05 Dec = -5.59 11109.9
At 2009.326:09 RA = 240.04 Dec = -20.59 11157.9

At 2010.008:14 RA = 291.66 Dec = -21.95 11205.1
At 2010.056:10 RA = 339.50 Dec = -8.63 11252.9
At 2010.104:19 RA = 23.79 Dec = 9.92 11301.3
At 2010.152:18 RA = 71.02 Dec = 22.29 11349.2
At 2010.200:07 RA = 120.45 Dec = 20.49 11396.8
At 2010.248:11 RA = 165.85 Dec = 6.05 11445.0
At 2010.296:20 RA = 210.03 Dec = -12.24 11493.3
At 2010.344:10 RA = 259.32 Dec = -23.08 11540.9

At 2011.026:18 RA = 310.38 Dec = -18.28 11588.2
At 2011.074:20 RA = 356.21 Dec = -1.64 11636.3
At 2011.123:03 RA = 40.93 Dec = 15.86 11684.6
At 2011.170:19 RA = 89.74 Dec = 23.44 11732.3
At 2011.218:12 RA = 137.98 Dec = 16.18 11780.0
At 2011.266:20 RA = 182.12 Dec = -0.92 11828.3
At 2011.314:23 RA = 227.68 Dec = -17.77 11876.5
At 2011.362:05 RA = 278.76 Dec = -23.20 11923.7

At 2012.044:17 RA = 327.93 Dec = -12.96 11971.2
At 2012.092:23 RA = 12.46 Dec = 5.34 12019.5
At 2012.141:00 RA = 58.43 Dec = 20.27 12067.5
At 2012.188:10 RA = 107.95 Dec = 22.41 12114.9
At 2012.236:08 RA = 154.41 Dec = 10.61 12162.8
At 2012.284:15 RA = 198.09 Dec = -7.67 12211.1
At 2012.332:08 RA = 245.62 Dec = -21.55 12258.8

At 2013.013:10 RA = 297.08 Dec = -21.11 12305.9
At 2013.061:05 RA = 344.20 Dec = -6.73 12353.7
At 2013.109:10 RA = 28.36 Dec = 11.64 12401.9
At 2013.157:02 RA = 75.83 Dec = 22.80 12449.6
At 2013.204:12 RA = 124.90 Dec = 19.58 12497.0
At 2013.252:13 RA = 169.76 Dec = 4.41 12545.0
At 2013.300:16 RA = 213.99 Dec = -13.62 12593.2
At 2013.348:00 RA = 263.58 Dec = -23.31 12640.5

At 2014.030:04 RA = 314.12 Dec = -17.29 12687.7
At 2014.078:02 RA = 359.41 Dec = -0.25 12735.6
At 2014.126:02 RA = 44.08 Dec = 16.78 12783.6
At 2014.173:11 RA = 92.84 Dec = 23.41 12831.0
At 2014.220:22 RA = 140.54 Dec = 15.41 12878.4
At 2014.269:00 RA = 184.32 Dec = -1.87 12926.5
At 2014.316:19 RA = 229.83 Dec = -18.33 12974.3
At 2014.363:18 RA = 280.77 Dec = -23.07 13021.3
At 2015.046:00 RA = 329.44 Dec = -12.43 13068.5
At 2015.093:23 RA = 13.62 Dec = 5.83 13116.5

===================================================================
Projections:
sun-vs-hst-npt -anode 243.43 -epoch 13122.5 -start 2015.001 -end 2017.001 -regression -6.6073
-----------------------------------------------------------
Times where RA of Sun is closest to RA of HST North Point
over the span 2015.001 - 2017.001
-----------------------------------------------------------
At 2015.046:03 RA = 329.56 Dec = -12.39 13068.6
At 2015.093:23 RA = 13.62 Dec = 5.83 13116.5
At 2015.141:13 RA = 59.26 Dec = 20.44 13164.0
At 2015.188:14 RA = 108.40 Dec = 22.36 13211.1
At 2015.236:03 RA = 154.47 Dec = 10.59 13258.6
At 2015.284:01 RA = 197.81 Dec = -7.55 13306.5
At 2015.331:09 RA = 244.89 Dec = -21.43 13353.9
At 2016.013:03 RA = 296.00 Dec = -21.29 13400.6
At 2016.060:13 RA = 342.91 Dec = -7.26 13448.0
At 2016.108:09 RA = 26.70 Dec = 11.02 13495.9
At 2016.155:18 RA = 73.67 Dec = 22.59 13543.3
At 2016.202:20 RA = 122.53 Dec = 20.08 13590.3
At 2016.250:13 RA = 167.31 Dec = 5.44 13638.0
At 2016.298:10 RA = 211.11 Dec = -12.63 13685.9
At 2016.345:12 RA = 260.01 Dec = -23.12 13733.0
At 2017.026:08 RA = 310.52 Dec = -18.24 13779.8
At 2017.073:23 RA = 355.91 Dec = -1.77 13827.5
At 2017.121:18 RA = 40.13 Dec = 15.61 13875.3
At 2017.168:22 RA = 88.33 Dec = 23.43 13922.4


Updated 2015-04-13


N.B.: The above estimates for the north-point time can be uncertain
by up to a day. Orbital decay projections are not consistently
applied across the modelling to determine these north-point times,
and even if they were those projections of decay-rates are uncertain
themselves when projected into the future.


Above is a list of the approximate dates when the
North Point of HST's orbit lines up with the sun. The
RAAN of the HST orbit may be found by subtracting 90-degrees
from the position of the sun.

The data in the top part of the table has been regenerated by
extrapolation from the data in the spss_archive and spss.fit_cat
tables. An older less accurate version of this data may be
found in hst_sun_north_points-old. The historical data in the
first part of the table are generated by running the sequence
of commands:

cd $LRP_DIR/orbit_model_updates
isql -w256 < $LRP_ISQL/fitcatdump3.isql > historical_fitcat_orbit_data.rpt
fitcat-to-npt.py $LRP_DIR/orbit_model_updates/historical_fitcat_orbit_data.rpt

To obtain the current projection, you must use the current HST orbit model
found in the default constraint set and using the tool sun-vs-hst-npt . Just run the
tool name--it will prompt you with what you need to enter.