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Lunar grazing occultation of 81 Tauri on 05 Feb 2017

Observer: Tim Haymes, 001°25'55.8"W, 51°46'40.6"N, 134 m (WGS84)

          UTC          AA       Star    Limb     O-C     O-C
      hh mm ss.ss      °         m        m       m       "
 D01  19 16 05.33  171.11313  +3540.8  +3532.5   +8.4  +0.0047
 R01  19 16 13.41  171.31989  +3052.8  +3044.6   +8.2  +0.0046
 D02  19 16 16.13  171.38951  +2893.5  +2886.7   +6.8  +0.0039
 R02  19 16 41.05  172.02793  +1552.6  +1550.9   +1.8  +0.0010
 D03  19 16 48.65  172.22281  +1186.1  +1185.2   +1.0  +0.0006
 R03  19 17 31.25  173.31639   -500.2   -517.4  +17.2  +0.0097
 D04  19 17 56.97  173.97746  -1215.6  -1218.8   +3.2  +0.0018
 R04  19 17 58.85  174.02580  -1259.0  -1267.3   +8.3  +0.0047
 D05  19 18 03.85  174.15436  -1368.3  -1371.7   +3.4  +0.0019
 R05  19 18 13.21  174.39508  -1549.8  -1558.7   +8.9  +0.0050
 D06  19 18 13.41  174.40022  -1553.4  -1538.7  -14.7  -0.0083
 R06  19 18 15.01  174.44138  -1581.3  -1592.1  +10.8  +0.0062
 D07  19 18 19.57  174.55867  -1655.9  -1661.3   +5.4  +0.0031

 Mean O-C = (+5.3 +/- 7.4) m = (+0.0030 +/- 0.0042)"

Star: Gaia DR2 (3312628358950130176) propagated to time of event

Ephemeris: DE430, IAU2006/IAU2000B

Adjustments: UT1-UTC = +0.5474 s, PM = (+0.028, +0.289)"

Mean lunar radius: 1738.091 km
Mean limb radius : 1738071 m
Limb plane scale : 1763.969 m per arcsec (at limb)

Topocentric libration: L = -0.312°, B = +7.321°, R = 363844678 m

Limb profile source: LRO/LOLA (LDEM_128, V3.0, 2017-09-15)

Analysis by: John Irwin (May 2019)

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Lunar grazing occultation of SAO 109080 on 28 Sep 2015

Observer: Tim Haymes, 000°41'57.4"W, 50°59'31.6"N, 88 m (WGS84)

          UTC          AA       Star    Limb     O-C     O-C
      hh mm ss.ss      °         m        m       m       "
 D01  02 31 45.18    2.57480   -100.4    -90.0  -10.5  -0.0061
 R01  02 32 05.06    1.99075    -25.6    -32.1   +6.5  +0.0038
 D02  02 32 10.50    1.83091    +26.7    +43.7  -17.0  -0.0099
 R02  02 32 16.58    1.65227   +101.4    +93.9   +7.5  +0.0044

 Mean O-C = (-3.4 +/- 12.3) m = (-0.0020 +/- 0.0072)"

Star: Gaia DR2 (2546372108482847360) propagated to time of event

Ephemeris: DE430, IAU2006/IAU2000B

Adjustments: UT1-UTC = +0.2350 s, PM = (+0.216, +0.323)"

Mean lunar radius: 1738.091 km
Mean limb radius : 1738070 m
Limb plane scale : 1714.762 m per arcsec (at limb)

Topocentric libration: L = -0.453°, B = +0.962°, R = 353695047 m

Limb profile source: LRO/LOLA (LDEM_128, V3.0, 2017-09-15)

Analysis by: John Irwin (May 2019)

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