メタデータ
| 項目 |
値 |
| Designation |
C/2012 V1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2013-07-21T12:56:16.166400Z |
| Orbit solution date (soln_date, UTC) |
2022-06-07T21:44:04Z |
| Obs used |
98 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-12-06.0000000 |
| e |
0.99939324 |
| q (au) |
2.089202 |
| a (au) |
3443.236545 |
| i (deg) |
157.839966 |
| Ω (om, deg) |
85.369420 |
| ω (w, deg) |
123.335286 |
| M (ma, deg) |
359.998890 |
等級
散乱 + 全体線形
$$
M_a = (16.808 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.808 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.649 |
| k |
0.800 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
10:56:41.78 |
-18:10:48.0 |
HIP 53518 |
18.93 |
| 2026-03-26 12:00 |
10:56:37.63 |
-18:10:15.3 |
HIP 53518 |
19.63 |
| 2026-03-27 00:00 |
10:56:33.50 |
-18:09:42.4 |
HIP 53518 |
20.37 |
| 2026-03-27 12:00 |
10:56:29.38 |
-18:09:09.4 |
HIP 53518 |
21.15 |
| 2026-03-28 00:00 |
10:56:25.28 |
-18:08:36.2 |
HIP 53518 |
21.95 |
| 2026-03-28 12:00 |
10:56:21.20 |
-18:08:02.9 |
HIP 53518 |
22.79 |
| 2026-03-29 00:00 |
10:56:17.13 |
-18:07:29.5 |
HIP 53518 |
23.64 |
| 2026-03-29 12:00 |
10:56:13.08 |
-18:06:56.0 |
HIP 53518 |
24.52 |
| 2026-03-30 00:00 |
10:56:09.05 |
-18:06:22.3 |
HIP 53518 |
25.42 |
| 2026-03-30 12:00 |
10:56:05.03 |
-18:05:48.5 |
HIP 53518 |
26.33 |
| 2026-03-31 00:00 |
10:56:01.04 |
-18:05:14.7 |
HIP 53518 |
27.26 |
| 2026-03-31 12:00 |
10:55:57.06 |
-18:04:40.7 |
HIP 53518 |
28.20 |
| 2026-04-01 00:00 |
10:55:53.10 |
-18:04:06.6 |
HIP 53518 |
29.15 |
| 2026-04-01 12:00 |
10:55:49.16 |
-18:03:32.3 |
HIP 53518 |
30.10 |
| 2026-04-02 00:00 |
10:55:45.23 |
-18:02:58.0 |
HIP 53518 |
31.07 |
| 2026-04-02 12:00 |
10:55:41.33 |
-18:02:23.6 |
HIP 53518 |
32.05 |
| 2026-04-03 00:00 |
10:55:37.44 |
-18:01:49.1 |
HIP 53518 |
33.03 |
| 2026-04-03 12:00 |
10:55:33.58 |
-18:01:14.5 |
HIP 53518 |
34.02 |
| 2026-04-04 00:00 |
10:55:29.73 |
-18:00:39.8 |
HIP 53518 |
35.01 |
| 2026-04-04 12:00 |
10:55:25.91 |
-18:00:05.0 |
HIP 53518 |
36.00 |
| 2026-04-05 00:00 |
10:55:22.10 |
-17:59:30.1 |
HIP 53518 |
37.00 |
| 2026-04-05 12:00 |
10:55:18.32 |
-17:58:55.1 |
HIP 53518 |
38.00 |
| 2026-04-06 00:00 |
10:55:14.56 |
-17:58:20.1 |
HIP 53509 |
38.04 |
| 2026-04-06 12:00 |
10:55:10.82 |
-17:57:44.9 |
HIP 53509 |
38.08 |
| 2026-04-07 00:00 |
10:55:07.09 |
-17:57:09.7 |
HIP 53509 |
38.15 |
| 2026-04-07 12:00 |
10:55:03.40 |
-17:56:34.4 |
HIP 53509 |
38.25 |
| 2026-04-08 00:00 |
10:54:59.72 |
-17:55:59.1 |
HIP 53509 |
38.37 |
| 2026-04-08 12:00 |
10:54:56.07 |
-17:55:23.7 |
HIP 53509 |
38.51 |
| 2026-04-09 00:00 |
10:54:52.43 |
-17:54:48.2 |
HIP 53509 |
38.68 |
| 2026-04-09 12:00 |
10:54:48.82 |
-17:54:12.6 |
HIP 53509 |
38.87 |
| 2026-04-10 00:00 |
10:54:45.24 |
-17:53:37.0 |
HIP 53509 |
39.08 |
| 2026-04-10 12:00 |
10:54:41.67 |
-17:53:01.3 |
HIP 53509 |
39.32 |
| 2026-04-11 00:00 |
10:54:38.14 |
-17:52:25.6 |
HIP 53509 |
39.57 |
| 2026-04-11 12:00 |
10:54:34.62 |
-17:51:49.8 |
HIP 53509 |
39.85 |
| 2026-04-12 00:00 |
10:54:31.13 |
-17:51:14.0 |
HIP 53509 |
40.14 |
| 2026-04-12 12:00 |
10:54:27.66 |
-17:50:38.1 |
HIP 53174 |
39.20 |
| 2026-04-13 00:00 |
10:54:24.22 |
-17:50:02.2 |
HIP 53174 |
38.21 |
| 2026-04-13 12:00 |
10:54:20.80 |
-17:49:26.2 |
HIP 53174 |
37.23 |
| 2026-04-14 00:00 |
10:54:17.41 |
-17:48:50.2 |
HIP 53174 |
36.25 |
| 2026-04-14 12:00 |
10:54:14.04 |
-17:48:14.2 |
HIP 53174 |
35.27 |
| 2026-04-15 00:00 |
10:54:10.69 |
-17:47:38.1 |
HIP 53174 |
34.30 |
| 2026-04-15 12:00 |
10:54:07.38 |
-17:47:02.0 |
HIP 53174 |
33.34 |
| 2026-04-16 00:00 |
10:54:04.09 |
-17:46:25.9 |
HIP 53174 |
32.38 |