彗星快讯-SWAN

Object         H       G    Epoch       M                 Peri.          Node            Incl.               e                  n                  a                    
SWAN12B 10.4  0.15  K12BT 359.91217   19.77187  320.41035  136.50750  0.9783578  0.00429336  37.4919158


后续点
     SWAN12B  C2012 12 02.00094 19 14 03.18 -27 15 45.3          13.9 R NEOCPH47
     SWAN12B  C2012 12 02.00226 19 14 03.14 -27 15 41.4          13.8 R NEOCPH47
     SWAN12B  C2012 12 02.00342 19 14 03.05 -27 15 37.9          13.7 R NEOCPH47
     SWAN12B  C2012 12 02.00451 19 14 02.97 -27 15 35.0          13.7 R NEOCPH47
     SWAN12B  C2012 12 02.01450 19 14 02.43 -27 15 00.9          12.3 V NEOCPI39
     SWAN12B KC2012 12 02.02358 19 14 02.03 -27 14 37.1          12.3 R NEOCPI47
     SWAN12B KC2012 12 02.02551 19 14 01.85 -27 14 31.0          12.3 R NEOCPI47
     SWAN12B KC2012 12 02.03034 19 14 01.58 -27 14 18.3          12.3 R NEOCPI47
     SWAN12B KC2012 12 02.03178 19 14 01.50 -27 14 14.3          12.3 R NEOCPI47
     SWAN12B |C2012 12 02.03303 19 14 01.52 -27 14 18.1                 NEOCPH06
     SWAN12B |C2012 12 02.03393 19 14 01.51 -27 14 15.4                 NEOCPH06
     SWAN12B KC2012 12 02.03441 19 14 01.38 -27 14 07.1          12.3 R NEOCPI47
     SWAN12B |C2012 12 02.03483 19 14 01.42 -27 14 13.4                 NEOCPH06
     SWAN12B |C2012 12 02.03573 19 14 01.39 -27 14 10.4                 NEOCPH06
     SWAN12B KC2012 12 02.03642 19 14 01.28 -27 14 01.9          12.3 R NEOCPI47
     SWAN12B |C2012 12 02.03664 19 14 01.32 -27 14 08.5                 NEOCPH06
     SWAN12B |C2012 12 02.03754 19 14 01.29 -27 14 06.0          10.6 V NEOCPH06

澳大利亚爱好者Alan在STEREO图片中也找到了对应。雅虎邮件组的内容如下：

http://tech.groups.yahoo.com/group/stereohunter/message/1872
I saw this in couple of images a few days ago but thought it to be an asteroid,
the longer sequence show the path is at an angle to the ecliptic. Not there in
quick check for 20121121, will double check

kinr regards, Alan

(0,0)upleft Label X Y Median Slice
1 201211:20121127_220921_s4h2B 525 757 116 36
2 201211:20121127_120921_s4h2B 528 761 107 31
3 201211:20121127_040921_s4h2B 532 766 93 27
4 201211:20121126_100921_s4h2B 534 771 106 18
5 201211:20121125_080921_s4h2B 536 778 103 5

正式编号了：
M.P.E.C. 2012-X02                                Issued 2012 Dec. 2, 03:37 UT

COMET C/2012 V4

Observer details:
844 Los Molinos.  Observers R. Salvo, S. Roland, V. P鲥z.  Measurer R. Salvo.
    0.46-m f/2.7 Newtonian reflector + CCD.
D88 Hiratsuka.  Observer Y. Sugiyama.  0.25-m f/5.0 reflector + CCD.
E12 Siding Spring Survey.  Observer R. H. McNaught.  0.5-m Uppsala Schmidt
    + CCD.
E27 Thornlands.  Observer T. Lovejoy.  0.20-m f/2.1 Schmidt-Cassegrain + CCD.
H47 Vicksburg.  Observer C. Bell.  0.3-m Schmidt-Cassegrain + CCD.
I39 Observatorio Cruz del Sur, San Justo.  Observers A. Chapman, R. Contreras,
    F. Pezzente.  Measurer A. Chapman.  0.20-m f/4 reflector + CCD.
I47 Pierre Auger Observatory, Malargue.  Observers M. Masek, J. Cerny, J. Ebr,
    M. Prouza, P. Kubanek, M. Jelinek.  Measurer M. Masek.  0.3-m f/10
    reflector + CCD.

Orbital elements:
    C/2012 V4
Epoch 2012 Dec. 19.0 TT = JDT 2456280.5
T 2012 Dec. 19.76589 TT                                 MPC
q   0.8012016            (2000.0)            P               Q
n   0.01585877     Peri.   20.53689     +0.56404078     -0.70360762
a  15.6900059      Node   320.80747     -0.82036086     -0.53715985
e   0.9489355      Incl.  136.84819     -0.09415968     +0.46518342
P  62.15
From 43 observations 2012 Nov. 29-Dec. 2, mean residual 0".61.  The
   solution presented here is based on the assumption that this is a
   return of D/1827 M1 (Pons-Gambart), with two missed returns.  The
   1827 observations are known to be extremely noisy and this orbit
   represents seven normal places to ~ 0.5 deg.

Ephemeris:
    C/2012 V4
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1    m2
2012 11 02    20 26 09.1 -63 07 21   0.9001  1.1737    76.5    55.3  12.0
...
2012 11 17    19 31 07.4 -41 13 49   1.1427  1.0010    55.5    54.4  11.8
...
2012 11 25    19 20 41.4 -33 02 05   1.2960  0.9227    45.2    49.4  11.7
...
2012 12 01    19 14 55.9 -28 01 26   1.4079  0.8738    37.9    43.9  11.7
2012 12 02    19 14 03.6 -27 15 45   1.4258  0.8666    36.7    42.8  11.6
2012 12 03    19 13 12.4 -26 31 12   1.4435  0.8598    35.5    41.8  11.6
...
2012 12 09    19 08 21.0 -22 24 15   1.5425  0.8261    28.6    34.8  11.6
...
2012 12 17    19 02 15.4 -17 37 44   1.6509  0.8029    20.2    25.0  11.6
...
2013 01 01    18 51 22.7 -10 01 10   1.7607  0.8330    13.1    15.5  11.9

Gareth V. Williams           (C) Copyright 2012 MPC           M.P.E.C. 2012-X02

苏有无根据MPC的数据算出轨道？看看什么时候进C3

Ephemeris of comet C/2012 V4日期 时间 Top R.A. Top Dec R (AU) 距离 El ?Mag
28 十二月 2012 00:00:00 18h 54m 12.4s -11°55' 55" 0.8159 1.7441 12.9 11.8
28 十二月 2012 01:00:00 18h 54m 10.6s -11°54' 42" 0.8160 1.7444 12.9 11.8
28 十二月 2012 02:00:00 18h 54m 08.7s -11°53' 30" 0.8161 1.7446 12.9 11.8
28 十二月 2012 03:00:00 18h 54m 06.9s -11°52' 17" 0.8163 1.7448 12.9 11.8
28 十二月 2012 04:00:00 18h 54m 05.0s -11°51' 04" 0.8164 1.7450 12.9 11.8
28 十二月 2012 05:00:00 18h 54m 03.2s -11°49' 51" 0.8166 1.7452 12.9 11.8
28 十二月 2012 06:00:00 18h 54m 01.3s -11°48' 38" 0.8167 1.7454 12.9 11.8
28 十二月 2012 07:00:00 18h 53m 59.4s -11°47' 26" 0.8169 1.7457 12.9 11.8
28 十二月 2012 08:00:00 18h 53m 57.6s -11°46' 13" 0.8170 1.7459 12.9 11.8
28 十二月 2012 09:00:00 18h 53m 55.8s -11°45' 00" 0.8172 1.7461 12.9 11.8
28 十二月 2012 10:00:00 18h 53m 54.0s -11°43' 47" 0.8174 1.7463 12.8 11.8
28 十二月 2012 11:00:00 18h 53m 52.2s -11°42' 34" 0.8175 1.7465 12.8 11.8
28 十二月 2012 12:00:00 18h 53m 50.4s -11°41' 21" 0.8177 1.7467 12.8 11.8
28 十二月 2012 13:00:00 18h 53m 48.6s -11°40' 08" 0.8178 1.7469 12.8 11.8
28 十二月 2012 14:00:00 18h 53m 46.9s -11°38' 55" 0.8180 1.7471 12.8 11.8
28 十二月 2012 15:00:00 18h 53m 45.2s -11°37' 43" 0.8181 1.7473 12.8 11.8
28 十二月 2012 16:00:00 18h 53m 43.5s -11°36' 30" 0.8183 1.7475 12.8 11.8
28 十二月 2012 17:00:00 18h 53m 41.8s -11°35' 18" 0.8184 1.7477 12.8 11.8
28 十二月 2012 18:00:00 18h 53m 40.1s -11°34' 05" 0.8186 1.7479 12.8 11.8
28 十二月 2012 19:00:00 18h 53m 38.4s -11°32' 53" 0.8188 1.7481 12.8 11.8
28 十二月 2012 20:00:00 18h 53m 36.7s -11°31' 40" 0.8189 1.7483 12.8 11.9
28 十二月 2012 21:00:00 18h 53m 34.9s -11°30' 28" 0.8191 1.7485 12.8 11.9
28 十二月 2012 22:00:00 18h 53m 33.2s -11°29' 16" 0.8192 1.7487 12.8 11.9
28 十二月 2012 23:00:00 18h 53m 31.4s -11°28' 04" 0.8194 1.7489 12.8 11.9
29 十二月 2012 00:00:00 18h 53m 29.6s -11°26' 52" 0.8196 1.7491 12.8 11.9
29 十二月 2012 01:00:00 18h 53m 27.8s -11°25' 40" 0.8197 1.7493 12.8 11.9
29 十二月 2012 02:00:00 18h 53m 26.0s -11°24' 27" 0.8199 1.7495 12.8 11.9
29 十二月 2012 03:00:00 18h 53m 24.1s -11°23' 15" 0.8201 1.7497 12.8 11.9
29 十二月 2012 04:00:00 18h 53m 22.3s -11°22' 03" 0.8202 1.7499 12.8 11.9
29 十二月 2012 05:00:00 18h 53m 20.4s -11°20' 51" 0.8204 1.7501 12.8 11.9
29 十二月 2012 06:00:00 18h 53m 18.6s -11°19' 39" 0.8206 1.7503 12.8 11.9
29 十二月 2012 07:00:00 18h 53m 16.7s -11°18' 26" 0.8207 1.7505 12.8 11.9
29 十二月 2012 08:00:00 18h 53m 14.9s -11°17' 14" 0.8209 1.7507 12.8 11.9
29 十二月 2012 09:00:00 18h 53m 13.1s -11°16' 02" 0.8211 1.7509 12.8 11.9
29 十二月 2012 10:00:00 18h 53m 11.3s -11°14' 50" 0.8212 1.7511 12.8 11.9
29 十二月 2012 11:00:00 18h 53m 09.5s -11°13' 37" 0.8214 1.7512 12.8 11.9
29 十二月 2012 12:00:00 18h 53m 07.8s -11°12' 25" 0.8216 1.7514 12.8 11.9
29 十二月 2012 13:00:00 18h 53m 06.0s -11°11' 13" 0.8217 1.7516 12.8 11.9
29 十二月 2012 14:00:00 18h 53m 04.3s -11°10' 01" 0.8219 1.7518 12.8 11.9
29 十二月 2012 15:00:00 18h 53m 02.6s -11°08' 48" 0.8221 1.7520 12.8 11.9
29 十二月 2012 16:00:00 18h 53m 00.9s -11°07' 36" 0.8223 1.7522 12.8 11.9
29 十二月 2012 17:00:00 18h 52m 59.2s -11°06' 24" 0.8224 1.7523 12.8 11.9
29 十二月 2012 18:00:00 18h 52m 57.5s -11°05' 13" 0.8226 1.7525 12.8 11.9
29 十二月 2012 19:00:00 18h 52m 55.8s -11°04' 01" 0.8228 1.7527 12.8 11.9
29 十二月 2012 20:00:00 18h 52m 54.1s -11°02' 49" 0.8230 1.7529 12.8 11.9
29 十二月 2012 21:00:00 18h 52m 52.4s -11°01' 37" 0.8231 1.7530 12.8 11.9
29 十二月 2012 22:00:00 18h 52m 50.6s -11°00' 26" 0.8233 1.7532 12.8 11.9
29 十二月 2012 23:00:00 18h 52m 48.9s -10°59' 14" 0.8235 1.7534 12.8 11.9
30 十二月 2012 00:00:00 18h 52m 47.1s -10°58' 03" 0.8237 1.7536 12.8 11.9
30 十二月 2012 01:00:00 18h 52m 45.3s -10°56' 51" 0.8239 1.7537 12.8 11.9
30 十二月 2012 02:00:00 18h 52m 43.5s -10°55' 40" 0.8240 1.7539 12.8 11.9
30 十二月 2012 03:00:00 18h 52m 41.6s -10°54' 28" 0.8242 1.7541 12.8 11.9
30 十二月 2012 04:00:00 18h 52m 39.8s -10°53' 16" 0.8244 1.7542 12.8 11.9
30 十二月 2012 05:00:00 18h 52m 38.0s -10°52' 05" 0.8246 1.7544 12.8 11.9
30 十二月 2012 06:00:00 18h 52m 36.1s -10°50' 53" 0.8248 1.7546 12.8 11.9
30 十二月 2012 07:00:00 18h 52m 34.3s -10°49' 41" 0.8250 1.7547 12.8 11.9
30 十二月 2012 08:00:00 18h 52m 32.5s -10°48' 30" 0.8251 1.7549 12.8 11.9
30 十二月 2012 09:00:00 18h 52m 30.6s -10°47' 18" 0.8253 1.7551 12.8 11.9
30 十二月 2012 10:00:00 18h 52m 28.9s -10°46' 06" 0.8255 1.7552 12.8 11.9
30 十二月 2012 11:00:00 18h 52m 27.1s -10°44' 54" 0.8257 1.7554 12.8 11.9
30 十二月 2012 12:00:00 18h 52m 25.3s -10°43' 43" 0.8259 1.7556 12.8 11.9
30 十二月 2012 13:00:00 18h 52m 23.6s -10°42' 31" 0.8261 1.7557 12.8 11.9
30 十二月 2012 14:00:00 18h 52m 21.9s -10°41' 19" 0.8263 1.7559 12.8 11.9
30 十二月 2012 15:00:00 18h 52m 20.2s -10°40' 08" 0.8265 1.7560 12.8 11.9
30 十二月 2012 16:00:00 18h 52m 18.5s -10°38' 56" 0.8266 1.7562 12.8 11.9
30 十二月 2012 17:00:00 18h 52m 16.8s -10°37' 45" 0.8268 1.7564 12.8 11.9
30 十二月 2012 18:00:00 18h 52m 15.1s -10°36' 34" 0.8270 1.7565 12.8 11.9
30 十二月 2012 19:00:00 18h 52m 13.5s -10°35' 22" 0.8272 1.7567 12.8 11.9
30 十二月 2012 20:00:00 18h 52m 11.8s -10°34' 11" 0.8274 1.7568 12.8 11.9
30 十二月 2012 21:00:00 18h 52m 10.0s -10°33' 00" 0.8276 1.7570 12.8 11.9
30 十二月 2012 22:00:00 18h 52m 08.3s -10°31' 49" 0.8278 1.7571 12.8 11.9
30 十二月 2012 23:00:00 18h 52m 06.6s -10°30' 38" 0.8280 1.7573 12.8 11.9
31 十二月 2012 00:00:00 18h 52m 04.8s -10°29' 27" 0.8282 1.7574 12.9 11.9
31 十二月 2012 01:00:00 18h 52m 03.0s -10°28' 16" 0.8284 1.7576 12.9 11.9
31 十二月 2012 02:00:00 18h 52m 01.2s -10°27' 05" 0.8286 1.7577 12.9 11.9
31 十二月 2012 03:00:00 18h 51m 59.4s -10°25' 54" 0.8288 1.7579 12.9 11.9
31 十二月 2012 04:00:00 18h 51m 57.5s -10°24' 42" 0.8290 1.7580 12.9 11.9
31 十二月 2012 05:00:00 18h 51m 55.7s -10°23' 31" 0.8292 1.7581 12.9 11.9
31 十二月 2012 06:00:00 18h 51m 53.9s -10°22' 20" 0.8294 1.7583 12.9 11.9
31 十二月 2012 07:00:00 18h 51m 52.0s -10°21' 09" 0.8296 1.7584 12.9 11.9
31 十二月 2012 08:00:00 18h 51m 50.2s -10°19' 58" 0.8298 1.7586 12.9 11.9
31 十二月 2012 09:00:00 18h 51m 48.4s -10°18' 46" 0.8300 1.7587 12.9 11.9
31 十二月 2012 10:00:00 18h 51m 46.7s -10°17' 35" 0.8302 1.7588 12.9 11.9
31 十二月 2012 11:00:00 18h 51m 44.9s -10°16' 24" 0.8304 1.7590 12.9 11.9
31 十二月 2012 12:00:00 18h 51m 43.2s -10°15' 13" 0.8306 1.7591 12.9 11.9
31 十二月 2012 13:00:00 18h 51m 41.4s -10°14' 02" 0.8308 1.7593 13.0 11.9
31 十二月 2012 14:00:00 18h 51m 39.7s -10°12' 50" 0.8310 1.7594 13.0 11.9
31 十二月 2012 15:00:00 18h 51m 38.0s -10°11' 39" 0.8312 1.7595 13.0 11.9
31 十二月 2012 16:00:00 18h 51m 36.4s -10°10' 28" 0.8314 1.7597 13.0 11.9
31 十二月 2012 17:00:00 18h 51m 34.7s -10°09' 17" 0.8316 1.7598 13.0 11.9
31 十二月 2012 18:00:00 18h 51m 33.0s -10°08' 07" 0.8318 1.7599 13.0 11.9
31 十二月 2012 19:00:00 18h 51m 31.3s -10°06' 56" 0.8320 1.7601 13.0 11.9
31 十二月 2012 20:00:00 18h 51m 29.6s -10°05' 45" 0.8322 1.7602 13.0 11.9
31 十二月 2012 21:00:00 18h 51m 27.9s -10°04' 34" 0.8324 1.7603 13.0 11.9
31 十二月 2012 22:00:00 18h 51m 26.2s -10°03' 24" 0.8327 1.7604 13.0 11.9
31 十二月 2012 23:00:00 18h 51m 24.5s -10°02' 13" 0.8329 1.7606 13.1 11.9
01 一月 2013 00:00:00 18h 51m 22.7s -10°01' 03" 0.8331 1.7607 13.1 11.9
01 一月 2013 01:00:00 18h 51m 20.9s -09°59' 52" 0.8333 1.7608 13.1 11.9
01 一月 2013 02:00:00 18h 51m 19.1s -09°58' 41" 0.8335 1.7609 13.1 11.9
01 一月 2013 03:00:00 18h 51m 17.3s -09°57' 31" 0.8337 1.7611 13.1 11.9 最小日彗角距12.8度，C3视场直径15.5度，也就是只有角距小于7.75度的目标才能进入C3视场，没戏了，再说就算能进入，12等的亮度大大低于C3 中9.5的极限星等。

suhuasky 发表于 2012-12-2 19:07

                               
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Ephemeris of comet C/2012 V4最小日彗角距12.8度，C3视场直径15.5度，也就是只有角距小于7.75度的目标才能 ...

这亮度，进了也拍不到呀~

地面上的目视观测：
Morris format
2012 Dec 2.46 UT: m1=9.3, Dia.=3', DC=5...20cm L 57x...Michael Mattiazzo
(Castlemaine, Victoria)
ICQ format
2012 Dec 2.46, 9.3, 3' (M. Mattiazzo, Castlemaine, Victoria, Australia,
20-cm reflector);
这个就比较接近我在SWAN图片上估计的亮度了。

http://y234.cn/?p=6107
新彗星乃是百年失踪彗星？新发现托出新谜团

　　本站早先提及的新彗星，在美国东部时间12月1日晚得到正式编号为C/2012 V4，命名暂缺。CCD观测指出该彗星亮度约为11等，阿兰·海尔给出的目视报告为亮度9.4等，彗发直径2.2'。

　　麦克·梅耶指出新彗星的轨道根数和接近200年前丢失的Pons-Gambart彗星(D/1827 M1)很像，中野主一和 Gareth Williams 尝试将两个轨道联系起来，但1827年观测数据误差相当大（均大于0.5度），因此结果非常不可靠。如果这两颗彗星的确是同一个目标，那它的周期约为62.1年，且在1830年和1959年以略多于1AU的距离掠过土星和天王星。以下是 MPEC 2012-X02给出的轨道根数。

Epoch = 2012 Dec. 19.0 TT
T = 2012 Dec. 19.7659 TT Peri. = 20.5369
e = 0.948936 Node = 320.8075 2000.0
q = 0.801202 AU Incl. = 136.8482
a = 15.690006 AU n = 0.0158588 P = 62.149 years

　　由于C/2012 V4在前两次可能的回归均未被观测到，而且1827年的观测数据质量品质糟糕，所以这一个世纪谜团估计要等到2065年才能解开了。

关注中

Image taken on 2012 Dec 3.45 at an altitude of about 14 deg - with the seeing being somewhat poor. Image is a stack of 5 x 30sec exposures. Image size is 24' x 16' (north to top). Imager appears to show a tail of about 8' in PA 93deg.

被我猜对了，周期应该是185年左右，不是62年。

火星和2012 V4

C/2012 V4 (SWAN)
2012 Dec. 06.43 UT: m1=9.4, Dia.=2.6’, DC=4; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [No tail, comet altitude low, bushfire smoke near horizon affected observation. Comparison stars checked using Tycho-2 data in Guide 9.0; Method=M; Cat=TK]
2012 Dec. 05.42 UT: m1=9.3, Dia.=2’, DC=5; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Weak central condensation, small, diffuse and offset to the NE with coma appearing broad and fan-like from North to East by South-West. The inner coma enhances in Swan Band filter more so than the outer edges of the coma. Comparison stars checked using Tycho-2 data in Guide 9.0; Method=M; Cat=TK]
2012 Dec. 04.42 UT: m1=9.3, Dia.=2.5’, DC=4/5; 25cm L f:5 (39x); Chris Wyatt (Walcha, NSW, Australia) [Bright inner coma, almost stellar, slight elongation to WNW, coma brightness gradually falls off toward edges, enhances well in Swan Band filter. Comparison stars checked using Tycho-2 data in Guide 9.0; Method= M; Cat= TK]
2012 Dec. 04.08 UT: m1=10.2, Dia.=2´, DC=2, Tail: Not visible; 15cm SCT (37x); Salvador Aguirre (Hermosillo, Sonora, Mexico)
2012 Dec. 03.96 UT: m1=9.0 (S), Dia.=3', DC=5; 22cm L (60x); Marco Goiato (Araçatuba, Brasil)
2012 Dec. 03.455 UT: m1=9.5, Dia.=2', DC=5; 11.4cm f8 L (43x); (Rob Kaufman, Bright, Vic, Australia) [Small coma moderately condensed, no tail visible; bright inner coma visible in brief glimpses in poor seeing; low elevation in west, sky brightness. Ref=NOMAD1 data in ViZier; Method=M]
2012 Dic. 02.77 UT: m1=9.1, Dia.=4', DC=3/; 20cm SCT (77x); Juan José González (Alto del Trichero - Soto y Amío, alt. 1190 m, León, España) [Altura sobre el horizonte: 5º. Cielo muy claro de montaña. Estrellas de comparación a la misma baja altura que el cometa]
2012 Dec. 02.46 UT: m1=9.3, Dia.=3', DC=5; 20cm L (57x); Michael Mattiazzo (Castlemaine, Victoria, Australia)
2012 Dec. 02.44 UT: m1=9.8, Dia.=2.0', DC=4; 20cm Dobson; Con Stoitsis (Clonbinane, Victoria, Australia)
2012 Dec. 02.43 UT: m1=10.4, Dia.=2', DC=2/3, Tail: Not visible; 25x100 B; Will Godward (Moonta, South Australia, Australia)
2012 Dec. 02.35 UT: m1=10.5, Dia.=2', DC=2, Tail: Not visible; 40cm Dob f/4.5 (69x); Will Godward (Moonta, South Australia, Australia)
2012 Dec. 02.03 UT: m1=11.2 ccd, Dia.=1.4'; 30.5cm schmidt-cassegrain; Jakub Cerny [robotic telescope FRAM in Malargue, Argentina]