快讯:澳天文爱好者Lovejoy发现9等新彗星
根据MPC的最新快报,澳大利亚天文爱好者Terry Lovejoy在3月15日,使用佳能350D搭200毫米镜头,发现了一颗9等左右的新彗星。目前该彗星位置十分偏南(约-50度),人们正在对其进行后续观测以确定轨道。这是Terry的第一颗彗星,他在数次错失发现之后终成正果。(cmcn.y234.cn)
(更多消息随后跟进) 太靠南了,我看不到::22:: 不知是否能发展成为一颗亮彗星 太强了!!! 好!好事情!此彗星的发现者是业余的吗? 真是好消息,9等才被发现,说明他增亮得很快,很有可能是一颗亮彗星,期待ing
现在靠南,等过了近日点就是北半球的目标了。 原帖由 周恒 于 2007-3-17 16:01 发表
真是好消息,9等才被发现,说明他增亮得很快,很有可能是一颗亮彗星,期待ing
现在靠南,等过了近日点就是北半球的目标了。
话倒不是这么说,而是因为这颗彗星和太阳差不多是一个方向的,专业的巡天基本去不到那里。
期待新大彗星的出现! 菜鸟弱问一下,爱好者如何判断星等呢?比如说发现了一个新彗星,怎么依据拍到的PP来确定它的星等呢 ?::02:: Ephemeris of comet 2007e2
日期Geo R.A.Geo DecR (AU)距离El ?
18 三月 200720h 42m 09.7s-50°11' 03"1.18331.243262.7
23 三月 200720h 35m 22.0s-47°22' 08"1.19641.174666.3
28 三月 200720h 27m 47.4s-44°14' 28"1.21441.103470.4
02 四月 200720h 19m 14.4s-40°42' 36"1.23711.030975.1
07 四月 200720h 09m 30.7s-36°39' 54"1.26420.959080.3
12 四月 200719h 58m 22.4s-31°58' 43"1.29520.889786.2
17 四月 200719h 45m 34.7s-26°31' 00"1.32970.825892.7
22 四月 200719h 30m 54.6s-20°10' 23"1.36750.770699.9
27 四月 200719h 14m 14.3s-12°56' 09"1.40810.7280107.5
02 五月 200718h 55m 34.1s-04°58' 25"1.45120.7020115.0
07 五月 200718h 35m 05.8s+03°18' 33"1.49650.6956121.7
12 五月 200718h 13m 14.0s+11°20' 04"1.54360.7106126.7
17 五月 200717h 50m 37.4s+18°32' 09"1.59240.7464129.3
22 五月 200717h 28m 04.9s+24°32' 46"1.64250.8009129.5
27 五月 200717h 06m 27.3s+29°15' 47"1.69380.8708127.9
01 六月 200716h 46m 26.7s+32°46' 59"1.74610.9528125.2
06 六月 200716h 28m 31.7s+35°17' 50"1.79931.0441121.8
11 六月 200716h 12m 56.2s+37°00' 48"1.85311.1423118.3
16 六月 200715h 59m 42.9s+38°07' 03"1.90751.2456114.6
21 六月 200715h 48m 46.5s+38°45' 48"1.96241.3526111.1
26 六月 200715h 39m 56.3s+39°04' 21"2.01771.4621107.6
不会变很亮
在靠近地球的过程中远离太阳,亮度最大在4-5月,也最多在8等左右。
01 七月 200715h 32m 58.9s+39°08' 11"2.07321.5732104.3
06 七月 200715h 27m 40.7s+39°01' 19"2.12901.6853101.1
11 七月 200715h 23m 49.0s+38°46' 41"2.18491.797798.0
16 七月 200715h 21m 13.0s+38°26' 29"2.24101.910095.0
21 七月 200715h 19m 42.9s+38°02' 26"2.29712.021892.2
26 七月 200715h 19m 10.1s+37°35' 52"2.35332.132889.4
31 七月 200715h 19m 27.0s+37°07' 44"2.40942.242686.8
05 八月 200715h 20m 26.9s+36°38' 45"2.46552.351084.3
10 八月 200715h 22m 04.7s+36°09' 29"2.52162.457881.8
15 八月 200715h 24m 16.3s+35°40' 21"2.57762.562979.5
20 八月 200715h 26m 57.7s+35°11' 49"2.63352.665977.2
25 八月 200715h 30m 05.4s+34°44' 13"2.68922.766875.0
30 八月 200715h 33m 36.4s+34°17' 46"2.74482.865573.0
04 九月 200715h 37m 28.1s+33°52' 41"2.80032.961871.0
09 九月 200715h 41m 38.6s+33°29' 08"2.85573.055669.1
14 九月 200715h 46m 06.2s+33°07' 18"2.91083.146967.3
19 九月 200715h 50m 49.1s+32°47' 22"2.96593.235565.6
24 九月 200715h 55m 45.7s+32°29' 30"3.02073.321464.1
29 九月 200716h 00m 54.4s+32°13' 48"3.07533.404562.6
04 十月 200716h 06m 14.4s+32°00' 20"3.12983.484961.3
09 十月 200716h 11m 44.4s+31°49' 14"3.18413.562460.1
14 十月 200716h 17m 23.7s+31°40' 38"3.23813.637159.0
19 十月 200716h 23m 11.1s+31°34' 39"3.29203.708958.0
24 十月 200716h 29m 05.6s+31°31' 22"3.34573.777957.2
29 十月 200716h 35m 06.2s+31°30' 52"3.39923.844056.6
03 十一月 200716h 41m 12.4s+31°33' 10"3.45253.907456.0
08 十一月 200716h 47m 23.4s+31°38' 23"3.50563.968055.6
13 十一月 200716h 53m 38.4s+31°46' 36"3.55854.025955.4
18 十一月 200716h 59m 56.5s+31°57' 53"3.61124.081255.3
[ 本帖最后由 suhuasky 于 2007-3-18 00:35 编辑 ]
http://www.spaceweather.com/
NEW COMET LOVEJOY: On March 15th, Terry Lovejoy of Thornlands, Australia, discovered a new comet (C/2007 E2) in the southern constellation Indus. Remarkably, to make the find he used not a telescope but just a camera--a Canon 350D. At Lovejoy's request, John Drummund of Gisborne, New Zealand, confirmed the comet with this photo taken through a 0.41-m reflector: The new comet is green, 9th-magnitude, and located approximately at right ascension 20h 42m 55s, declination -50o 43' 14" (ref: International Astronomical Union Circular 8819). A detailed ephemeris is not yet available, so it is impossible to say how bright Comet Lovejoy will become--or even which way it will go. Stay tuned for updates. 8等已经很亮了,争取尽早拿下! 已经过了近日点了啊 国内何时能够观测到? 原帖由 suhuasky 于 2007-3-18 00:31 发表Ephemeris of comet 2007e2
日期Geo R.A.Geo DecR (AU)距离El ?
18 三月 200720h 42m 09.7s-50°11' 03"1.18331.243262.7
23 三月 200720h 35m 22.0s-47°22' 08"1.19641. ...
出处?
确认观测还没结束呀……?应该是prelimary的吧? 8、9等的彗星还嫌暗??那请问到了何种程度才叫亮?即便有亮彗星我们又能做什么?无非照片而已!
我自己算的轨道,两个版本,数据有点点差异,不过应该影响不大。
Orbital elements:
CK07E020
Perihelion 2007 Mar 28.346994 TT
Epoch 2007 Mar 18.0 TT = JDT 2454177.5 Find_Orb
q 1.099142 (2000.0) P Q
H 6.9 Peri.341.40797 -0.54543824 0.27822995
Node 232.72216 -0.58593357 0.54792118
e 1.0613588 Incl. 96.48061 -0.59931541 -0.78890459
From 8 observations 2007 Mar. 15-17; RMS error 1.573 arcseconds
Orbital elements:
CK07E020
Perihelion 2007 Mar 28.641588 TT
Epoch 2007 Mar 18.0 TT = JDT 2454177.5 Find_Orb
q 1.090334 (2000.0) P Q
H 7.0 Peri.342.01662 -0.55801774 0.28106449
Node 231.86382 -0.58561509 0.53324854
e 1.0533720 Incl. 96.94090 -0.58793805 -0.79790271
From 7 observations 2007 Mar. 15-17; RMS error 1.203 arcseconds
H值比IAUC里的偏大了,算出来的亮度亮了2等左右。
另外计算了彗星大概的经天图。
[ 本帖最后由 Archimedes 于 2007-3-18 22:24 编辑 ] 彗星可能最大亮度会接近7等 MPEC 2007-F32(http://cfa-www.harvard.edu/mpec/K07/K07F32.html)发布了E2的轨道跟数,条件相当不错:
Orbital elements:
C/2007 E2 (Lovejoy)
T 2007 Mar. 27.565 TT MPC
q 1.09294 (2000.0) P Q
Peri.340.609 -0.548043 -0.279200
Node 232.436 -0.573703 -0.560510
e 1.0 Incl. 95.894 -0.608698 +0.779664
From 36 observations 2007 Mar. 15-18.
Ephemeris:
C/2007 E2 (Lovejoy)
Date TT R. A. (2000) Decl. Delta r Elong.Phase m1 m2
2007 03 11 20 49.29 -53 30.8 1.258 1.126 58.6 48.8 9.5
2007 03 13 20 47.17 -52 35.4 1.218 1.119 59.8 50.1 9.4
2007 03 15 20 44.93 -51 36.5 1.176 1.112 61.0 51.4 9.3
2007 03 17 20 42.55 -50 33.7 1.134 1.107 62.2 52.7 9.2
2007 03 19 20 40.02 -49 26.4 1.092 1.102 63.5 54.0 9.1
2007 03 21 20 37.34 -48 13.9 1.048 1.098 64.9 55.2 9.0
2007 03 23 20 34.48 -46 55.3 1.004 1.096 66.4 56.5 8.9
2007 03 25 20 31.43 -45 29.6 0.960 1.094 67.9 57.6 8.8
2007 03 27 20 28.17 -43 55.7 0.915 1.093 69.5 58.8 8.7
2007 03 29 20 24.69 -42 12.3 0.871 1.093 71.2 59.8 8.6
2007 03 31 20 20.96 -40 17.7 0.826 1.094 73.0 60.8 8.5
2007 04 02 20 16.95 -38 10.1 0.782 1.097 74.9 61.6 8.4
2007 04 04 20 12.63 -35 47.1 0.739 1.100 76.8 62.3 8.3
2007 04 06 20 07.98 -33 06.2 0.696 1.104 78.9 62.8 8.1
2007 04 08 20 02.94 -30 04.2 0.655 1.109 81.2 63.1 8.0
2007 04 10 19 57.47 -26 37.9 0.615 1.115 83.5 63.2 7.9
2007 04 12 19 51.53 -22 43.5 0.578 1.122 86.1 63.0 7.8
2007 04 14 19 45.04 -18 17.5 0.543 1.130 88.7 62.6 7.7
2007 04 16 19 37.95 -13 17.0 0.513 1.138 91.5 61.8 7.6
2007 04 18 19 30.18 -07 40.7 0.486 1.148 94.3 60.7 7.5
2007 04 20 19 21.66 -01 30.2 0.465 1.158 97.1 59.4 7.5
2007 04 22 19 12.30 +05 09.2 0.451 1.169 99.8 57.9 7.4
2007 04 24 19 02.04 +12 07.5 0.443 1.181 102.2 56.3 7.5
2007 04 26 18 50.79 +19 10.7 0.443 1.194 104.1 54.8 7.5
2007 04 28 18 38.50 +26 03.3 0.450 1.207 105.5 53.5 7.6
2007 04 30 18 25.11 +32 31.1 0.464 1.221 106.2 52.4 7.7 哇!又有事做了!
争取看到 4月下旬,约7等,观测条件非常好,天鹰座附近,后半夜,接近天顶。
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