P/2012 C3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2012 C3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-10-05T09:58:58.944000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:02Z |
| Obs used |
20 |
| NEO |
- |
| M1 |
13.500 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-02-17.0000000 |
| e |
0.62652717 |
| q (au) |
3.624891 |
| a (au) |
9.705904 |
| i (deg) |
9.189868 |
| Ω (om, deg) |
135.441268 |
| ω (w, deg) |
344.851612 |
| M (ma, deg) |
4.386758 |
等級
散乱 + 全体線形
$$
M_a = (15.290 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.290 |
| n |
2.000 |
| gf |
0.997 |
| gb |
-0.823 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
20:00:56.56 |
-18:06:31.6 |
HIP 98502 |
11.37 |
| 2026-02-03 12:00 |
20:01:04.79 |
-18:06:09.0 |
HIP 98502 |
12.43 |
| 2026-02-04 00:00 |
20:01:13.00 |
-18:05:46.5 |
HIP 98502 |
13.71 |
| 2026-02-04 12:00 |
20:01:21.20 |
-18:05:23.9 |
HIP 98502 |
15.13 |
| 2026-02-05 00:00 |
20:01:29.37 |
-18:05:01.3 |
HIP 98502 |
16.67 |
| 2026-02-05 12:00 |
20:01:37.53 |
-18:04:38.6 |
HIP 98502 |
18.29 |
| 2026-02-06 00:00 |
20:01:45.68 |
-18:04:16.0 |
HIP 98502 |
19.97 |
| 2026-02-06 12:00 |
20:01:53.80 |
-18:03:53.4 |
HIP 98732 |
21.61 |
| 2026-02-07 00:00 |
20:02:01.91 |
-18:03:30.8 |
HIP 98732 |
20.16 |
| 2026-02-07 12:00 |
20:02:10.00 |
-18:03:08.1 |
HIP 98732 |
18.81 |
| 2026-02-08 00:00 |
20:02:18.06 |
-18:02:45.5 |
HIP 98732 |
17.57 |
| 2026-02-08 12:00 |
20:02:26.11 |
-18:02:22.9 |
HIP 98732 |
16.48 |
| 2026-02-09 00:00 |
20:02:34.14 |
-18:02:00.2 |
HIP 98732 |
15.56 |
| 2026-02-09 12:00 |
20:02:42.14 |
-18:01:37.6 |
HIP 98732 |
14.84 |
| 2026-02-10 00:00 |
20:02:50.13 |
-18:01:15.0 |
HIP 98732 |
14.35 |
| 2026-02-10 12:00 |
20:02:58.09 |
-18:00:52.3 |
HIP 98732 |
14.11 |
| 2026-02-11 00:00 |
20:03:06.03 |
-18:00:29.7 |
HIP 98732 |
14.13 |
| 2026-02-11 12:00 |
20:03:13.95 |
-18:00:07.1 |
HIP 98732 |
14.41 |
| 2026-02-12 00:00 |
20:03:21.84 |
-17:59:44.5 |
HIP 98732 |
14.94 |
| 2026-02-12 12:00 |
20:03:29.72 |
-17:59:21.9 |
HIP 98732 |
15.68 |
| 2026-02-13 00:00 |
20:03:37.56 |
-17:58:59.3 |
HIP 98732 |
16.60 |
| 2026-02-13 12:00 |
20:03:45.39 |
-17:58:36.8 |
HIP 98732 |
17.68 |
| 2026-02-14 00:00 |
20:03:53.18 |
-17:58:14.2 |
HIP 98732 |
18.89 |
| 2026-02-14 12:00 |
20:04:00.96 |
-17:57:51.7 |
HIP 98732 |
20.19 |
| 2026-02-15 00:00 |
20:04:08.70 |
-17:57:29.2 |
HIP 98732 |
21.58 |
| 2026-02-15 12:00 |
20:04:16.42 |
-17:57:06.8 |
HIP 98732 |
23.04 |
| 2026-02-16 00:00 |
20:04:24.12 |
-17:56:44.3 |
HIP 98970 |
22.73 |
| 2026-02-16 12:00 |
20:04:31.78 |
-17:56:21.9 |
HIP 98970 |
21.12 |
| 2026-02-17 00:00 |
20:04:39.42 |
-17:55:59.5 |
HIP 98970 |
19.55 |
| 2026-02-17 12:00 |
20:04:47.03 |
-17:55:37.1 |
HIP 98970 |
18.05 |
| 2026-02-18 00:00 |
20:04:54.61 |
-17:55:14.8 |
HIP 98970 |
16.62 |
| 2026-02-18 12:00 |
20:05:02.17 |
-17:54:52.5 |
HIP 98970 |
15.28 |
| 2026-02-19 00:00 |
20:05:09.69 |
-17:54:30.2 |
HIP 98970 |
14.06 |
| 2026-02-19 12:00 |
20:05:17.18 |
-17:54:08.0 |
HIP 98970 |
12.99 |
| 2026-02-20 00:00 |
20:05:24.65 |
-17:53:45.8 |
HIP 98970 |
12.10 |
| 2026-02-20 12:00 |
20:05:32.08 |
-17:53:23.6 |
HIP 98970 |
11.43 |
| 2026-02-21 00:00 |
20:05:39.48 |
-17:53:01.5 |
HIP 98970 |
11.02 |
| 2026-02-21 12:00 |
20:05:46.85 |
-17:52:39.4 |
HIP 98970 |
10.90 |
| 2026-02-22 00:00 |
20:05:54.19 |
-17:52:17.4 |
HIP 98970 |
11.06 |
| 2026-02-22 12:00 |
20:06:01.49 |
-17:51:55.4 |
HIP 98970 |
11.50 |
| 2026-02-23 00:00 |
20:06:08.76 |
-17:51:33.5 |
HIP 98970 |
12.19 |
| 2026-02-23 12:00 |
20:06:16.00 |
-17:51:11.6 |
HIP 98970 |
13.07 |
| 2026-02-24 00:00 |
20:06:23.21 |
-17:50:49.8 |
HIP 98970 |
14.11 |