|
Image:
1999 July 29
|
Observed by Ageo Survey team on July 27. The CCD images show the narrow tail and broad anti-tail. Southern observers cannot see it until October.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 7 30.56 36 33.5 1.635 0.813 23 6.9 27.8 322.0 5:28 (235,-15)
Aug. 7 7 20.15 39 7.8 1.561 0.888 32 7.0 28.9 321.0 5:23 (230,-11)
|
Image:
1999 July 24
|
New comet. Appearing at dusk even in the Northerm Hemisphere. It is brighter than expected. It will keep over 20 deg high in the evening sky in August in the Northern Hemisphere, although it set down under the horizon in the Southern Hemisphere. After that, it is alwasy observable for Northern people. It locates low at dusk until late October, then it turns to appear at dawn. It passes near by the North Pole in early February in 2000.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 11 54.10 12 45.3 0.913 0.777 47 7.7 82.6 43.3 18:44 (126, 22)
Aug. 7 12 15.96 18 33.3 1.099 0.815 45 8.3 54.4 40.9 18:48 (128, 16)
|
Image:
1999 June 12
|
Brightened rapidly and reached to 11 mag in mid June visually. It will close to the earth down to 0.4 AU in October and maybe reach to 6.4 mag. In the Northern Hemisphere, people can observe it until mid November. But because the comet is moving southwards, it will just over the horizon after the approach to the earth. It will not be obesrvable after 2000 February. On the other hand, southern people cannot see it until the approach.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 9 10.22 61 55.2 1.833 1.306 43 10.0 19.3 199.0 18:44 (146,-31)
Aug. 7 9 4.28 59 46.5 1.760 1.234 43 9.6 19.6 198.5 5:23 (217,-35)
|
Image:
1999 June 30
|
11 mag visually, well condensed and easy to see. It is stellar by CCD.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 17 4.34 -17 40.5 0.677 1.535 129 10.0 22.2 154.7 20:30 (180, 73)
Aug. 7 17 10.30 -20 0.1 0.695 1.518 124 9.9 24.6 143.4 20:08 (180, 75)
|
Image:
1999 June 30
|
It was brighter than the ephemeris in July. Northern people can observe it only until mid August. After conjunction, it appears again at dawn as 15 mag in December. On the other hand, it keeps high until late August in the Southern Hemisphere.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 14 7.34 -26 27.0 1.151 1.552 91 10.6 38.5 315.9 18:44 (115, 72)
Aug. 7 13 56.81 -23 48.0 1.377 1.587 81 11.1 23.9 320.5 18:48 (107, 63)
|
Image:
1999 July 8
|
12 mag visually. 14 mag by CCD. The condition keeps good until September.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 0 46.04 6 19.0 1.025 1.714 114 12.0 11.2 30.2 4:14 (180, 49)
Aug. 7 0 47.68 7 21.2 1.007 1.752 120 12.2 8.2 9.4 3:48 (180, 48)
|
|
Only southern people can observe it. Northern people can never see it again.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 6 34.85 -65 2.0 8.999 8.999 86 12.3 7.0 129.9 5:28 (329, 40)
Aug. 7 6 40.66 -65 35.0 9.055 9.052 86 12.4 7.1 134.7 5:23 (330, 42)
|
Image:
1998 Dec. 13
|
Appearing over horizon at dawn, but it is too low to observe until September.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 6 54.47 17 0.7 2.732 1.862 24 12.7 36.4 98.0 5:28 (247, 3)
Aug. 7 7 11.77 16 21.7 2.735 1.893 27 12.9 35.5 99.7 5:23 (246, 5)
|
Image:
1998 Dec. 5
|
Only southern people can observe it. It will appear again in 2000 August as 13 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 9 1.66 -50 1.0 3.854 3.609 68 12.9 17.1 128.0 18:44 ( 44, 24)
Aug. 7 9 11.82 -51 18.7 3.846 3.590 67 12.9 18.3 129.9 18:48 ( 41, 21)
|
Image:
1999 May 20
|
Not observable. After conjunction, it will appear again at dawn in mid October as 14.5 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 9 56.05 13 0.2 3.827 2.889 19 13.5 19.4 140.6 18:44 (106, 0)
Aug. 7 10 1.88 11 17.0 3.923 2.952 14 13.7 18.9 140.2 18:48 (101, -4)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 14 45.18 -25 56.5 5.902 6.147 99 13.8 2.9 72.8 18:44 (139, 78)
Aug. 7 14 46.87 -25 51.7 6.009 6.145 92 13.8 3.8 82.1 18:48 (120, 74)
|
Image:
1999 July 8
|
Although it will be low in October and November, Northern people can observe it as 14 mag until 2000 April. Then they can trace it until July as the comet gets low at dusk as 16.5 mag. It is 13 mag visually.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 14 45.03 49 44.8 3.591 3.504 76 14.5 21.4 219.3 18:44 (174, 5)
Aug. 7 14 36.43 47 48.3 3.664 3.502 72 14.6 19.8 213.2 18:48 (168, 6)
|
|
Not yet observed in this return. We can observe it as 14 mag from summer though winter under good condition. However, maybe it is much fainter actually.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 3 16.17 10 17.5 1.781 1.859 78 14.8 32.8 79.0 5:28 (205, 41)
Aug. 7 3 31.28 10 58.1 1.718 1.853 80 14.7 31.9 80.3 5:23 (202, 41)
|
Image:
1999 July 8
|
Because it is far away, it keeps 15 mag until late 2000, while Northern people can observe it under good condition.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 21 34.45 38 5.8 4.138 4.754 122 14.9 4.7 248.6 1:03 (180, 17)
Aug. 7 21 31.73 37 48.7 4.069 4.728 125 14.8 5.8 236.4 0:32 (180, 17)
|
|
Not yet observed in this return. Now is the chance for the first observation. It will keep around 25 deg high until October when it becomes 12.5 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 0 51.31 -28 15.3 1.359 2.082 121 15.4 13.3 111.9 4:19 (180, 83)
Aug. 7 0 57.28 -28 52.6 1.273 2.039 125 15.2 11.6 119.6 3:57 (180, 84)
|
Image:
1999 June 14
|
The perihelion passage is in 2000 July, when it will be 13.5 mag. But the comet is in the southern sky. Northern people can observe it until October as 15 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 18 44.83 -20 6.0 3.592 4.520 152 15.3 17.7 232.6 22:09 (180, 75)
Aug. 7 18 38.04 -21 20.4 3.612 4.478 144 15.3 16.8 231.2 21:35 (180, 76)
|
|
Not yet observed in this return. We can observe it as 15 mag from summer though winter under good condition. However, maybe it is much fainter actually.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 4 19.32 33 36.5 2.223 1.917 59 15.5 35.5 67.1 5:28 (209, 14)
Aug. 7 4 37.83 35 9.3 2.171 1.917 61 15.4 35.1 68.4 5:23 (208, 13)
|
Image:
1999 July 8
|
Because it is extremely far away, it keeps 15 mag until late 2000, while Northern people can observe it under good condition. Visual observers reported it as 14 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 15 36.26 54 57.4 7.347 7.291 82 15.5 11.6 196.1 19:01 (180, 0)
Aug. 7 15 34.09 53 38.5 7.376 7.281 80 15.5 11.6 191.0 18:48 (178, 1)
|
|
Not yet observed in this return. We can observe it until November as 15-16 mag. But it should be much fainter than the ephemeris.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 4 33.75 43 12.1 2.662 2.270 56 15.5 27.4 66.0 5:28 (207, 4)
Aug. 7 4 49.70 44 27.0 2.628 2.297 60 15.5 26.3 66.7 5:23 (205, 4)
|
Image:
1999 July 8
|
It will keep over 60 deg high until late November, when it will be 18 mag, so we can observe its fading out under good condition. It is 14.5 mag visually.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 18 21.44 36 57.9 1.612 2.248 115 15.6 8.2 318.9 21:46 (180, 18)
Aug. 7 18 18.97 37 30.6 1.652 2.252 113 15.6 4.4 317.5 21:16 (180, 17)
|
|
First return, but not yet detected. It will be brightening slowly and reach to 15 mag in September. However, maybe it is much fainter actually.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 1 47.64 9 4.0 2.139 2.509 99 15.6 15.0 88.9 5:15 (180, 46)
Aug. 7 1 54.31 9 2.1 2.065 2.515 104 15.6 13.2 93.6 4:54 (180, 46)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 4 17.32 39 39.2 1.359 1.218 59 15.7 12.4 32.1 5:28 (206, 9)
Aug. 7 4 20.76 40 52.4 1.361 1.314 65 15.9 11.4 23.4 5:23 (202, 9)
|
Image:
1999 June 14
|
About 3 mag brighter than expected based on the pre-perihelion observations.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 18 26.08 -17 18.9 2.356 3.264 148 15.9 4.8 253.8 21:51 (180, 72)
Aug. 7 18 24.27 -17 28.5 2.442 3.296 141 16.1 3.1 243.1 21:21 (180, 72)
|
Image:
1999 May 31
|
It will be over 45 deg high and 17 mag until mid November.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 19 57.19 0 31.2 4.394 5.351 158 16.0 14.2 289.7 23:21 (180, 54)
Aug. 7 19 51.09 1 2.6 4.427 5.360 154 16.0 13.4 288.2 22:48 (180, 54)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 15 45.13 -15 40.3 9.168 9.566 110 16.2 0.3 147.1 19:10 (180, 71)
Aug. 7 15 45.37 -15 42.3 9.288 9.576 103 16.2 0.9 114.8 18:48 (176, 71)
|
Image:
1999 June 30
|
We can observe it until October when it fades to 17 mag and becomes low in the evening sky.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 15 2.43 12 58.8 5.301 5.419 91 16.3 3.6 108.7 18:44 (175, 42)
Aug. 7 15 4.33 12 49.4 5.423 5.446 85 16.3 4.7 108.5 18:48 (165, 41)
|
Image:
1998 Dec. 13
|
It was 16.6 mag (m2) on July 10. It is very low in the Northern Hemisphere. But it never locates over 10 deg high after mid August, so now is the last chance.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 23 19.48 -39 52.8 4.761 5.571 139 16.3 13.8 207.6 2:47 ( 0, 85)
Aug. 7 23 15.26 -41 16.6 4.777 5.620 142 16.4 13.8 212.0 2:16 ( 0, 84)
|
Image:
1999 Feb. 6
|
Appearing at dawn. It is probably much fainter than the ephemris.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 4 30.25 21 29.4 3.427 3.018 58 16.7 15.3 79.1 5:28 (218, 23)
Aug. 7 4 37.51 21 48.4 3.377 3.057 63 16.7 14.1 79.5 5:23 (214, 25)
|
|
Appearing at dawn. It will be 16 mag and locale high in next autumn and winter.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 5 26.75 30 8.1 2.973 2.368 45 16.9 29.1 86.4 5:28 (223, 9)
Aug. 7 5 42.34 30 17.7 2.910 2.360 48 16.8 28.8 87.9 5:23 (222, 10)
|
|
New comet. We can observe it as 17.5 mag until October. After conjunction, we can observe it again as 17 mag in spring and autumn in 2000.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 18 51.61 0 38.5 5.050 5.930 147 17.2 17.1 262.6 22:16 (180, 54)
Aug. 7 18 43.88 0 21.7 5.090 5.913 141 17.3 16.3 260.9 21:40 (180, 55)
|
|
It keeps 17.5 mag and 40 deg high until October. A stellar object.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 20 2.11 -13 9.8 1.536 2.542 169 17.5 12.3 262.5 23:26 (180, 68)
Aug. 7 19 56.39 -13 22.1 1.516 2.503 162 17.4 11.7 260.6 22:53 (180, 68)
|
|
First return of a split comet. The condition is best and we can always observe it until it faded out. The ephemeris is based on the outburst in 1994, so it will be much fainter in fact.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 31 16 52.50 -11 22.6 1.227 1.991 124 17.9 14.7 282.8 20:17 (180, 66)
Aug. 7 16 46.65 -11 3.0 1.233 1.920 116 17.6 10.5 282.8 19:44 (180, 66)
|