Predictions for Grazing Occultation of R2876, 2013 May 28
Graze profile
Grazing Occultation of 2876SK1 Magnitude 5.3 [Red = 4.7] s
R2876 = 54 Sagittarii
Date: 2013 May 28 11h 24m, to 2013 May 28 11h 27m
Nominal site altitude 100m
E. Longit. Latitude U.T. Sun Moon TanZ PA AA CA
o ' " o ' " h m s Alt Alt Az o o o
167 0 0 -45 2 2 11 23 59 25 89 2.19 172.0 181.26 6.74S
167 10 0 -45 3 53 11 24 5 25 89 2.17 171.9 181.24 6.72S
167 20 0 -45 5 44 11 24 12 25 88 2.16 171.9 181.22 6.70S
167 30 0 -45 7 35 11 24 18 25 88 2.15 171.9 181.21 6.69S
167 40 0 -45 9 24 11 24 25 25 88 2.13 171.9 181.19 6.67S
167 50 1 -45 11 13 11 24 31 25 88 2.12 171.9 181.17 6.65S
168 0 1 -45 13 2 11 24 38 25 88 2.11 171.9 181.16 6.64S
168 10 1 -45 14 50 11 24 44 26 88 2.09 171.8 181.14 6.62S
168 20 1 -45 16 38 11 24 51 26 88 2.08 171.8 181.12 6.60S
168 30 1 -45 18 24 11 24 57 26 87 2.07 171.8 181.10 6.58S
168 40 1 -45 20 11 11 25 4 26 87 2.06 171.8 181.09 6.57S
168 50 1 -45 21 57 11 25 11 26 87 2.04 171.8 181.07 6.55S
169 0 1 -45 23 42 11 25 17 26 87 2.03 171.8 181.05 6.53S
169 10 2 -45 25 26 11 25 24 26 87 2.02 171.7 181.03 6.51S
169 20 2 -45 27 10 11 25 31 26 87 2.01 171.7 181.01 6.49S
169 30 2 -45 28 54 11 25 38 27 86 2.00 171.7 181.00 6.48S
169 40 2 -45 30 37 11 25 45 27 86 1.98 171.7 180.98 6.46S
169 50 2 -45 32 19 11 25 52 27 86 1.97 171.7 180.96 6.44S
170 0 2 -45 34 1 11 25 58 27 86 1.96 171.6 180.94 6.42S
170 10 2 -45 35 42 11 26 5 27 86 1.95 171.6 180.92 6.40S
170 20 2 -45 37 23 11 26 12 27 86 1.94 171.6 180.90 6.39S
170 30 3 -45 39 3 11 26 19 27 86 1.93 171.6 180.89 6.37S
170 40 3 -45 40 42 11 26 26 28 85 1.92 171.6 180.87 6.35S
170 50 3 -45 42 21 11 26 33 28 85 1.90 171.6 180.85 6.33S
Path coordinates are referred to WGS84 (as used by GPS), with the
nominal site altitude being referenced to Mean Sea Level.
Projected diameter of star 4 meters [Estimated]
2876 is variable:
2876 = NSV 12275, 5.28 to 5.36, V
2876 is triple:
AC 5.4 7.7 45" 42.0 (HJ 599) Graze path of C 64.51 km south, and 64.9 secs later compared to A
AB 5.4 12.6 71" 273.0 (HJ 599) Graze path of B 30.62 km south, and 128.7 secs earlier compared to A
C A S S I N I R E G I O N G R A Z E
Librations Long +4.71 Lat -6.76
P +180.52 D -6.58
Illumination of moon 84%-
Elongation of Moon 133
Vertical Profile Scale 2.10 km/arcsec at mean distance of moon
Horizontal Scale Factor 1.88 deg/min
At longitude 169.00:
Limiting Magnitudes for various telescope apertures (in cm)
CA\Tdia 5 10 15 20 25 30 35
2.5 2.6 3.9 4.6 5.0 5.3 5.5 5.6
4.5 4.4 5.8 6.5 6.9 7.2 7.4 7.5
6.5 4.4 5.8 6.5 6.9 7.2 7.4 7.5
8.5 4.7 6.1 6.8 7.2 7.5 7.7 7.8
10.5 5.2 6.6 7.4 7.8 8.1 8.3 8.4
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Double star catalogue details
WDS entries
RA Dec Name Y1 Y2 N PA PA Sep Sep M1 M2
19407-1618HJ 599AB 1828 2009 7 273 279 15.0 45.2 5.42 12.6 K2III F8V +071-048 -16 5399 N 194043.34-161735.3
19407-1618HJ 599AC 1827 2010 33 40 42 40.0 45.3 5.42 7.65 +069-051 +077-054 -16 5400 N D 194043.34-161735.3
19407-1618ANT 6AD 2009 2009 1 252 252 56.8 56.8 5.42 13.9 +069-051 -026-010 194043.34-161735.3
19409-1619BU 1287 1899 1936 4 144 143 1.1 1.2 10.8 11.5 !194054. -1619
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Interferometric catalogue entries
194043.34-161735.3 ADS 12767 HJ 599A HD 185644 HIP 96808 19407-1618 N
Date PA Sep M1 M2
1980.723 . . < 0.030 . . . . . 470 3.8 1 Hrt1984 Sc
1985.521 . . < 0.038 . . . . . 549 22 3.6 1 McA1987a Sc
1991.25 . . < 0.1 . 5.46 . . . 511 222 0.3 1 HIP1997e Hh
194043.34-161735.3 ADS 12767 HJ 599AC HD 185644 HIP 96808 19407-1618 N
Date PA Sep M1 M2
1991.62 42.0 . 45.643 . 5.421 0.009 7.649 0.012 530 100 1.4 1 TYC2000b Ht
1991.62 . . . . 6.731 0.015 8.472 0.017 430 90 1.4 1 TYC2000b Ht
2003.628 41.5 . 44.72 . . . . . 550 0.7 1 WSI2004b Su
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AAVSO Variable star entry
Variable identifier Type Max Min Ph Epoch Period
NSV 12275 5.28 5.36 V
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Results of Observer Scan UT
Site Long. Lat. Dist. h m s
Chch graze 172.6 -43.5 267km 11 27 52
Dunedin 170.5 -45.9 24km 11 26 19
MidNZ 173.0 -41.0 550km 11 28 8
Lunar Limb Profile
