|
|
New bright comet discovered in the very low sky in the evening. It had been locating high in the evening sky in the Northern Hemisphere from last autumn to early March, while the comet brightened to 9.5 mag, however, it was not discovered. It approached to the Sun down to 0.17 AU on Apr. 18. During several days around the perihelion passage, it is visible in the SOHO LASCO field. In the Northern Hemisphere, it appears at dawn at 7 mag in late April. It will be a good target for visual observation in May. It passes very close by C/2003 T3 ( Tabur ) on Apr. 25.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 1 47.44 5 48.4 0.852 0.172 4 1.9 185.4 322.7 20:03 (115,-20)
Apr. 24 1 5.69 23 44.2 0.900 0.319 18 4.8 122.8 340.9 3:45 (241, 0)
|
|
It will be 2 mag in May. In the Southern Hemisphere, it keeps observable in the south-western sky at dusk. In the Northern Hemisphere, it is not observable until May.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 2 53.91 -65 12.0 0.698 1.085 76 4.1 73.4 77.7 20:03 ( 31,-36)
Apr. 24 4 28.05 -60 28.4 0.516 1.035 78 3.3 134.5 57.2 20:11 ( 35,-28)
|
|
Appearing at dawn. It was observed at 4.6 mag on Apr. 9. In the Southern Hemisphere, it is best opportunity to see the comet in the morning until mid May. In the Northern Hemisphere, it locates extremely low sky at dawn until early May.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 23 52.18 5 29.0 1.317 0.629 27 4.5 15.7 178.3 3:56 (263, 0)
Apr. 24 23 54.81 3 24.8 1.078 0.615 34 4.0 23.7 148.3 3:45 (267, 2)
|
|
Appearing at dawn. Juro Kobayashi observed it on Apr. 14 as 11 mag by CCD, which suggests it is about 9.5 mag visually now. The brightness evolution in 2003 autumn had been very slow, and it must have continued until now. After this, it keeps low until autumn. It passes very close by a new comet C/2004 F4 ( Bradfield ) on Apr. 25.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 0 40.21 21 24.4 2.410 1.490 18 9.5 49.4 42.6 3:56 (244, 0)
Apr. 24 0 57.64 25 40.1 2.379 1.482 20 9.5 50.6 43.5 3:45 (240, 3)
|
|
Although it was so faint as 14.6 mag in late February, it brightened rapidly in late March. Now it is 10-11 mag visually. It is observable in good condition in the Southern Hemisphere. But in the Northern Hemisphere, it keeps locating lower than 15 deg until June.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 22 23.41 -13 21.0 1.679 1.368 54 10.8 50.6 70.8 3:56 (292, 7)
Apr. 24 22 45.89 -11 22.4 1.663 1.373 55 10.8 49.4 69.8 3:45 (289, 7)
|
|
The condition is worst in this return. It is not observable around the perihelion passage. It will appear at dawn in autumn, when it will already fade to 15 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 0 52.23 10 6.4 2.085 1.123 12 11.6 61.9 73.6 3:56 (251, -9)
Apr. 24 1 20.95 12 4.5 2.058 1.090 11 11.3 63.4 75.0 3:45 (248,-10)
|
|
Well condensed and easy to see. It is about 0.5 mag brighter than this ephemeris visually. It will be 6.5 mag in the southern sky from autumn to winter in 2004. In the Northern Hemisphere, it is observable in good condition until early September when it becomes to 7.5 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 20 14.05 26 37.3 2.864 2.832 78 11.8 16.1 348.3 3:56 (273, 56)
Apr. 24 20 11.55 28 33.7 2.686 2.750 82 11.5 18.6 340.1 3:45 (273, 60)
|
|
It was diffused around 11.5 mag visually in February and March. But it suddenly began to fade in mid April. It will be lower and fainter gradually in the evening sky after this.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 8 59.69 -17 9.1 1.759 2.325 111 12.6 39.1 297.7 20:03 ( 14, 37)
Apr. 24 8 45.12 -15 11.2 1.918 2.347 102 12.8 30.0 300.9 20:11 ( 29, 35)
|
|
It will be lower and lower while fading after this.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 4 47.58 16 25.3 2.141 1.608 45 12.9 43.4 92.0 20:03 ( 95, 22)
Apr. 24 5 8.63 16 10.3 2.189 1.622 43 13.0 43.2 93.4 20:11 ( 97, 19)
|
|
Not observable. It will appear at dawn in May.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 23 50.19 4 57.1 6.592 5.725 28 13.8 11.8 62.5 3:56 (264, 0)
Apr. 24 23 55.02 5 35.1 6.537 5.725 33 13.8 11.5 62.0 3:45 (265, 3)
|
|
At the previous appearance, it brightened after the perihelion passage and reached to 10 mag. If it has behaved so again, it could have reach to 13 mag in February and March. However, it must be much fainter actually than expected. It seems to go while nobody succeeded to observe it in this return.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 3 24.16 9 19.6 2.638 1.784 25 14.4 40.8 75.8 20:03 (101, 1)
Apr. 24 3 42.65 10 25.2 2.710 1.831 23 14.6 39.5 77.1 20:11 (104, -2)
|
|
Not observable. It will appear at dawn again at 15 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 0 51.40 12 42.3 4.934 3.960 12 14.5 5.2 41.7 3:56 (249, -7)
Apr. 24 0 52.95 13 9.3 4.950 4.006 18 14.6 4.9 38.4 3:45 (251, -4)
|
|
It became brighter than expected after the perihelion passage, and it was observed visually around 13.5 mag in February and March. After this, it will be fading.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 12 53.87 8 35.5 1.395 2.354 157 14.9 13.1 244.6 23:09 ( 0, 64)
Apr. 24 12 48.73 7 52.0 1.444 2.377 151 15.1 12.0 235.5 22:36 ( 0, 63)
|
|
The brightness evolution is gradual in this return. So it will reach to 15 mag at best.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 16 6.12 0 46.9 1.099 1.990 142 15.0 5.7 328.1 2:25 ( 0, 56)
Apr. 24 16 3.98 1 16.9 1.097 2.020 147 15.1 7.1 301.2 1:56 ( 0, 56)
|
|
Althouhg it must be fainter than 17 mag, it unexpectedly brightened from February to March and reached to 14.5 mag. It has already begun to fade, and faded to 16 mag in mid April.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 11 30.83 9 49.7 1.965 2.823 141 15.5 5.0 300.0 21:46 ( 0, 65)
Apr. 24 11 29.32 10 2.4 2.056 2.853 134 15.7 2.4 299.6 21:18 ( 0, 65)
|
|
It is expected to be 5 mag in 2005 spring. Until that time, it keeps observable in the Northern Hemisphere, which the comet will be getting brighter gradually.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 4 54.80 70 21.8 5.081 4.779 66 15.8 6.7 122.7 20:03 (156, 38)
Apr. 24 5 3.16 69 58.3 5.074 4.708 63 15.8 7.2 115.1 20:11 (155, 36)
|
|
In the Northern Hemisphere, it keeps fading at about 35 deg high until August when it becomes fainter than 18 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 19 33.59 -18 54.3 2.144 2.448 95 15.8 10.2 79.3 3:56 (328, 29)
Apr. 24 19 37.87 -18 42.3 2.094 2.489 100 15.8 7.5 78.4 3:45 (331, 31)
|
|
It will be fading slowly until November when it becomes fainter than 18 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 19 14.16 32 38.5 5.861 5.945 89 16.9 12.0 7.1 3:56 (270, 70)
Apr. 24 19 14.67 34 1.1 5.830 5.974 93 16.9 11.7 1.7 3:45 (268, 73)
|
|
It was 18.5 mag in early April, about 1 mag fainter than this ephemeris. It will reach to 15 mag in summer.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 19 41.45 -14 41.0 2.349 2.596 92 17.1 16.3 85.5 3:56 (324, 32)
Apr. 24 19 48.96 -14 33.0 2.243 2.576 97 16.9 14.9 86.3 3:45 (326, 34)
|
|
It keeps 17 mag until July.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 16 15.94 52 59.6 5.528 5.923 108 16.9 16.6 304.3 2:35 (180, 72)
Apr. 24 16 4.74 53 59.5 5.538 5.936 108 17.0 16.7 297.9 1:57 (180, 71)
|
|
It will be observable at 17.5 mag in good condition until August.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 18 30.09 10 40.1 2.879 3.288 105 17.1 7.2 54.7 3:56 (331, 63)
Apr. 24 18 32.43 11 7.9 2.815 3.298 109 17.0 5.4 46.6 3:45 (338, 65)
|
|
It will become fainter than 18 mag, and too low to observe in June. It was about 0.5 mag brighter than this ephemeris around the opposition from December to February.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 8 1.54 25 16.8 4.149 4.269 90 17.4 7.4 77.5 20:03 ( 74, 65)
Apr. 24 8 5.57 25 26.3 4.269 4.284 84 17.5 8.5 82.3 20:11 ( 81, 59)
|
|
It was observed around 17.5 mag recently. It will be fainter than 18 mag in late May.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 13 35.62 7 33.0 6.051 7.012 161 17.5 9.5 267.0 23:51 ( 0, 63)
Apr. 24 13 31.21 7 28.2 6.116 7.057 157 17.5 9.2 264.5 23:19 ( 0, 62)
|
|
It will be observable around 17.5 mag until June.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 18 17.22 -7 59.9 4.115 4.587 111 17.7 5.8 215.2 3:56 (346, 46)
Apr. 24 18 15.25 -8 34.3 4.038 4.612 119 17.7 7.2 224.4 3:45 (352, 46)
|
|
Fading slowly. It will be observable in good condition until May when it will be fainter than 18 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 9 28.31 44 22.0 4.542 4.833 100 17.7 7.4 174.2 20:03 (161, 80)
Apr. 24 9 29.20 43 30.1 4.697 4.894 95 17.8 7.7 165.0 20:11 (134, 77)
|
|
It was brighter than this ephemeris recently, around 17.5 mag.
|
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 17 11 40.74 12 28.7 3.199 4.040 142 18.2 6.8 275.3 21:56 ( 0, 67)
Apr. 24 11 37.81 12 30.1 3.250 4.025 135 18.2 5.4 267.8 21:26 ( 0, 67)
|