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ASTROMETRIC UPDATE:
OCCULTATION BY (738) ALAGASTA - 2021 May 26

[Edwin Goffin's Prediction + Finder Charts]

[Detailed Finder Charts]


Updated:   2021 APR 16, 06:13 UT

Event Rank : 100

(The event Rank is a measure of the likelihood of observing an event, and is equal to the probability of at least one successful observation by a team of two observers spaced 1/8 path width just inside opposite sides of the predicted path. An event rank of 100 indicates that the prediction is expected to be very accurate).


THE UPDATED PATH

Note: The duration given in the line below is the interval during which the occultation shadow sweeps across the Earth - please see the minute markers on the map to determine the approximate time for your location.

Alagasta Update Map


On 2021 May 26 UT, the 61 km diameter asteroid (738) Alagasta will occult a 11.7 mag star in the constellation Capricornus for observers along a path across the North Island of New Zealand from Wairoa to Te Kuiti (and into New South Wales at very low elevation).

In the case of an occultation, the combined light of the asteroid and the star will drop by 3.84 mag to 15.47 mag (the magnitude of the asteroid) for at most 15.0 seconds.

This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center.

This work has made use of data from the European Space Agency (ESA)mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, inparticular the institutions participating in the Gaia Multilateral Agreement.

Additional details of this and other events are available at Steve Preston's website at http://www.asteroidoccultation.com/

EVENT DETAILS SUMMARY : Data for the target star : Data for the minor planet : The Occultation Path :
Occultation of UCAC4 370-183626 by 738 Alagasta on 2021 May 26
                  Centre              Star  Star   Sun      Path Limits           Error Limits       Alt
  E. Longitude   Latitude      U.T.    Alt    Az   Alt    Limit 1    Limit 2    Limit 3    Limit 4   Crn
      o  '  "     o  '  "    h  m  s     o     o     o    o  '  "    o  '  "    o  '  "    o  '  "
                                                         Latitude   Latitude   Latitude   Latitude
    144  0  0   -31 15 49   12 22 43.5     0   109   -62  -31 35  4  -30 56 38  -31 36  6  -30 55 35   ....
    145  0  0   -31 33 16   12 22 43.8     1   108   -62  -31 52 30  -31 14  5  -31 53 33  -31 13  3   0.39
    146  0  0   -31 50 34   12 22 44.6     2   108   -63  -32  9 47  -31 31 24  -32 10 49  -31 30 22   0.42
    147  0  0   -32  7 41   12 22 45.7     3   107   -64  -32 26 53  -31 48 32  -32 27 56  -31 47 30   0.43
    148  0  0   -32 24 38   12 22 47.3     4   107   -65  -32 43 49  -32  5 30  -32 44 52  -32  4 28   0.44

    149  0  0   -32 41 25   12 22 49.3     5   106   -65  -33  0 34  -32 22 18  -33  1 37  -32 21 16   0.44
    150  0  0   -32 58  0   12 22 51.7     6   105   -66  -33 17  9  -32 38 54  -33 18 11  -32 37 52   0.44
    151  0  0   -33 14 24   12 22 54.5     6   105   -67  -33 33 32  -32 55 20  -33 34 34  -32 54 18   0.45
    152  0  0   -33 30 37   12 22 57.7     7   104   -67  -33 49 43  -33 11 33  -33 50 45  -33 10 31   0.45
    153  0  0   -33 46 37   12 23  1.4     8   104   -68  -34  5 42  -33 27 35  -34  6 44  -33 26 33   0.45

    154  0  0   -34  2 25   12 23  5.4     9   103   -68  -34 21 29  -33 43 25  -34 22 31  -33 42 23   0.45
    155  0  0   -34 18  1   12 23  9.8    10   103   -69  -34 37  4  -33 59  2  -34 38  6  -33 58  0   0.45
    156  0  0   -34 33 24   12 23 14.5    11   102   -70  -34 52 25  -34 14 26  -34 53 27  -34 13 24   0.45
    157  0  0   -34 48 34   12 23 19.7    12   101   -70  -35  7 34  -34 29 37  -35  8 36  -34 28 36   0.45
    158  0  0   -35  3 31   12 23 25.2    13   101   -71  -35 22 29  -34 44 35  -35 23 31  -34 43 34   0.45

    159  0  0   -35 18 14   12 23 31.1    13   100   -71  -35 37 11  -34 59 20  -35 38 13  -34 58 18   0.45
    160  0  0   -35 32 43   12 23 37.4    14   100   -71  -35 51 39  -35 13 51  -35 52 40  -35 12 49   0.45
    161  0  0   -35 46 58   12 23 44.0    15    99   -72  -36  5 52  -35 28  7  -36  6 54  -35 27  6   0.45
    162  0  0   -36  0 59   12 23 51.0    16    98   -72  -36 19 52  -35 42 10  -36 20 53  -35 41  8   0.45
    163  0  0   -36 14 46   12 23 58.4    17    98   -72  -36 33 37  -35 55 58  -36 34 38  -35 54 56   0.45

    164  0  0   -36 28 17   12 24  6.1    18    97   -73  -36 47  7  -36  9 31  -36 48  8  -36  8 30   0.45
    165  0  0   -36 41 34   12 24 14.1    19    96   -73  -37  0 22  -36 22 49  -37  1 23  -36 21 48   0.45
    166  0  0   -36 54 36   12 24 22.5    19    96   -73  -37 13 22  -36 35 52  -37 14 23  -36 34 51   0.45
    167  0  0   -37  7 22   12 24 31.2    20    95   -73  -37 26  7  -36 48 40  -37 27  8  -36 47 39   0.45
    168  0  0   -37 19 53   12 24 40.2    21    94   -73  -37 38 36  -37  1 12  -37 39 37  -37  0 12   0.45

    169  0  0   -37 32  8   12 24 49.6    22    94   -73  -37 50 50  -37 13 29  -37 51 51  -37 12 29   0.45
    170  0  0   -37 44  7   12 24 59.2    23    93   -73  -38  2 47  -37 25 30  -38  3 48  -37 24 30   0.44
    171  0  0   -37 55 51   12 25  9.2    24    92   -73  -38 14 29  -37 37 15  -38 15 30  -37 36 14   0.44
    172  0  0   -38  7 18   12 25 19.5    25    92   -73  -38 25 55  -37 48 44  -38 26 55  -37 47 43   0.44
    173  0  0   -38 18 29   12 25 30.1    25    91   -73  -38 37  4  -37 59 56  -38 38  4  -37 58 56   0.44

    174  0  0   -38 29 23   12 25 41.0    26    90   -73  -38 47 57  -38 10 52  -38 48 57  -38  9 52   0.44
    175  0  0   -38 40  1   12 25 52.2    27    89   -72  -38 58 33  -38 21 31  -38 59 33  -38 20 31   0.44
    176  0  0   -38 50 22   12 26  3.7    28    89   -72  -39  8 53  -38 31 54  -39  9 53  -38 30 54   0.44
    177  0  0   -39  0 26   12 26 15.5    29    88   -72  -39 18 55  -38 42  0  -39 19 55  -38 41  0   0.44
    178  0  0   -39 10 14   12 26 27.5    29    87   -71  -39 28 41  -38 51 49  -39 29 41  -38 50 49   0.44

    179  0  0   -39 19 44   12 26 39.8    30    86   -71  -39 38 10  -39  1 21  -39 39 10  -39  0 21   0.44
Uncertainty in time = +/- 4 secs
Prediction of 2021 Apr 16.0

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