Grazing Occultation of     541SB8      Magnitude 3.9 [Red = 3.9]  s
   R541 = Maia = 20 Tauri
Date: 2026 Jan 27 21h 36m,  to  2026 Jan 27 21h 42m

Nominal site altitude 10m

E. Longit.   Latitude       U.T.    Sun  Moon   TanZ   PA    AA      CA
   o  '  "    o  '   "    h  m  s   Alt Alt Az          o     o      o
-  7  0  0   56 15  2.9  21 36 13       53 224  0.76 166.2 178.49   3.09S
-  6 45  0   56 15 17.2  21 36 31       52 224  0.77 166.2 178.54   3.04S
-  6 30  0   56 15 29.7  21 36 50       52 225  0.77 166.3 178.58   2.99S
-  6 15  0   56 15 40.1  21 37  8       52 225  0.78 166.3 178.63   2.94S
-  6  0  0   56 15 48.7  21 37 27       52 225  0.78 166.4 178.68   2.90S
-  5 45  0   56 15 55.3  21 37 45       52 226  0.78 166.4 178.73   2.85S
-  5 30  0   56 16  0.0  21 38  4       52 226  0.79 166.5 178.77   2.80S
-  5 15  0   56 16  2.7  21 38 22       52 227  0.79 166.5 178.82   2.75S
-  5  0  0   56 16  3.5  21 38 40       52 227  0.79 166.6 178.87   2.71S
-  4 45  0   56 16  2.4  21 38 58       51 228  0.80 166.6 178.92   2.66S
-  4 30  0   56 15 59.3  21 39 17       51 228  0.80 166.6 178.96   2.61S
-  4 15  0   56 15 54.4  21 39 35       51 228  0.81 166.7 179.01   2.57S
-  4  0  0   56 15 47.5  21 39 53       51 229  0.81 166.7 179.06   2.52S
-  3 45  0   56 15 38.7  21 40 11       51 229  0.81 166.8 179.10   2.47S
-  3 30  0   56 15 28.0  21 40 29       51 230  0.82 166.8 179.15   2.43S
-  3 15  0   56 15 15.4  21 40 47       51 230  0.82 166.9 179.20   2.38S
-  3  0  0   56 15  0.8  21 41  5       50 230  0.83 166.9 179.24   2.33S
-  2 45  0   56 14 44.4  21 41 23       50 231  0.83 167.0 179.29   2.29S
-  2 30  0   56 14 26.1  21 41 41       50 231  0.83 167.0 179.33   2.24S
-  2 15  0   56 14  5.8  21 41 58       50 232  0.84 167.1 179.38   2.19S
-  2  0  0   56 13 43.7  21 42 16       50 232  0.84 167.1 179.43   2.15S

Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level. The path
is adjusted for the effects of refraction at low moon altitudes.

Projected diameter of star  1 meters  [CHARM2/CADARS, 2 measures]

541 is variable: 
       541 = NSV 1279, 3.87, range 0.00, 4Kp, Type ACV, Period 10.288 days

541 is quadruple: 
  Aa,Ab 4.4 5.4            (OCC 248) Graze path of Ab approximately 0.0 km south, and 0.0 secs later compared to Aa
  - refer to graze profile for exact distances
  AB 3.8 13.7 113"  72.6 (HL   11) Graze path of B approximately 17.5 km south, and 241.7 secs later compared to A
  - refer to graze profile for exact distances
  AB 3.8 13.7 113"  72.7 (HL   11) Graze path of B approximately 17.0 km south, and 242.0 secs later compared to A
  - refer to graze profile for exact distances

    C A S S I N I   R E G I O N   G R A Z E
                Librations  Long -2.42   Lat -6.17
                            P +179.21     D -5.95
      Illumination of moon  69%+
        Elongation of Moon  112
    Vertical Profile Scale  approx. 2.12 km/arcsec at mean distance of moon
   Horizontal Scale Factor  1.65 deg/min


At longitude -4.50:
Limiting Magnitudes for various telescope apertures (in cm)
      CA\Tdia   5    10    15    20    25    30    35
    -1.4      2.9   4.3   5.1   5.5   5.9   6.1   6.3
     0.6      2.9   4.3   5.1   5.5   5.9   6.1   6.3
     2.6      4.8   6.3   7.0   7.5   7.9   8.1   8.3
     4.6      4.8   6.3   7.1   7.6   7.9   8.2   8.3
     6.6      5.7   7.1   7.9   8.4   8.8   9.1   9.3

------------------------------------------------------------------------------
Double star catalogue details
WDS entries 
 
  RA  Dec Name          Y1   Y2     N  PA  PA   Sep   Sep  M1    M2 
03456+2420COU 560Aa,Ab 1970 2008   22   4 330   0.3   0.2  7.4   9.0  A1V       +021-051          +23  512      034537.78+242008.2 
03456+2420HJL1025AB    1892 2011   15 163 164 176.4 175.7  7.20  9.91           +019-046 +018-050               034537.78+242008.2 
03458+2422HL   11      1886 2011    5  76  73 112.8 113.3  3.85 13.72           +021-046          +23  516 N    034549.59+242204.3 
 
------------------------------------------------ 
Interferometric catalogue entries 
 
034549.59+242204.3  Pleiades H 242            OCC 248Aa,Ab              HD  23408    HIP  17573         03458+2422 N   
    Date       PA              Sep                  M1             M2 
  1971.      V 69.      .      0.003      .         4.4     .      5.4     .                  .    1  OCC2002  O       
  1971.6914  V190.0     .       .         .          .      .       .      .                  .    1  Bvr1974  O       
  1971.8414  V286.      .       .         .          .      .       .      .                  .    1  Bth1975b O       
  1971.9915  V190.9     .       .         .          .      .       .      .                  .    1  Bvr1974  O       
  1972.2156  V 40.8     .       .         .          .      .       .      .                  .    1  Bth1975a O       
  1975.9590      .      .   <  0.033      .          .      .       .      .       517  20   3.8   1  McA1978c Sc      
  1976.8600      .      .   <  0.035      .          .      .       .      .       552  20   3.8   1  McA1978c Sc      
  1976.9228      .      .   <  0.035      .          .      .       .      .       552  20   3.8   1  McA1978c Sc      
  1979.771       .      .   <  0.030      .          .      .       .      .       470       3.8   1  Hrt1984  Sc      
  1980.718       .      .   <  0.030      .          .      .       .      .       470       3.8   1  Hrt1984  Sc      
  1980.724       .      .   <  0.030      .          .      .       .      .       470       3.8   1  Hrt1984  Sc      
  1981.6903      .      .   <  0.025      .          .      .       .      .       550    ?  6.0   1  Bag1984b S       
  1987.7627      .      .   <  0.035      .          .      .       .      .       549  22   3.8   1  Msn1993b Sc      
  1987.9989  V 69.      .      0.0013    0.0005      .      .      0.99   0.05     440  98    .    1  Qia1991  O       
  1988.1483  V 79.      .      0.0163     .          .      .      2.4     .       550  89   0.4   1  Osb1996  O       
  1988.9094      .      .   <  0.078      .          .      .       .      .       549  22   1.8   1  McA1997  Sc      
  1991.25        .      .   <  0.1        .         3.86    .       .      .       511 222   0.3   1  HIP1997e Hh      
  1991.9045      .      .   <  0.035      .          .      .       .      .       549  22   3.8   1  Msn1993b Sc      
  2005.8631      .      .   <  0.036      .          .      .       .      .       550  24   3.8   1  Msn2009  Su      
 

------------------------------------------------------------------------------
Results of Observer Scan                                    UT
Site                              Long.   Lat.   Dist.    h  m  s
Edinburgh                          -3.2   56.0    28km   21 40 50.5
IoM_500Km                          -4.5   54.2   233km   21 39 16.6

