メタデータ
| 項目 |
値 |
| Designation |
C/2024 W1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-19T01:48:39.398400Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:00Z |
| Obs used |
27 |
| NEO |
- |
| M1 |
5.100 |
| K1 |
28.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-11-22T14:32:42.374400Z |
| Discovery magnitude (MPC) |
20.74 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-12-13.0000000 |
| e |
0.94290668 |
| q (au) |
2.560778 |
| a (au) |
44.852495 |
| i (deg) |
83.200718 |
| Ω (om, deg) |
310.728342 |
| ω (w, deg) |
256.729174 |
| M (ma, deg) |
359.684763 |
等級
散乱 + 全体線形
$$
M_a = (10.270 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.270 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-03-26 00:00 |
21:48:26.80 |
-32:20:08.5 |
HIP 107630 |
4.91 |
| 2026-03-26 12:00 |
21:48:41.45 |
-32:17:21.6 |
HIP 107630 |
8.61 |
| 2026-03-27 00:00 |
21:48:55.96 |
-32:14:35.9 |
HIP 107630 |
12.56 |
| 2026-03-27 12:00 |
21:49:10.32 |
-32:11:51.2 |
HIP 107630 |
16.57 |
| 2026-03-28 00:00 |
21:49:24.53 |
-32:09:07.7 |
HIP 107630 |
20.57 |
| 2026-03-28 12:00 |
21:49:38.58 |
-32:06:25.3 |
HIP 107630 |
24.56 |
| 2026-03-29 00:00 |
21:49:52.48 |
-32:03:44.0 |
HIP 107630 |
28.52 |
| 2026-03-29 12:00 |
21:50:06.24 |
-32:01:03.8 |
HIP 107630 |
32.45 |
| 2026-03-30 00:00 |
21:50:19.83 |
-31:58:24.8 |
HIP 107630 |
36.35 |
| 2026-03-30 12:00 |
21:50:33.28 |
-31:55:46.9 |
HIP 107881 |
38.28 |
| 2026-03-31 00:00 |
21:50:46.57 |
-31:53:10.0 |
HIP 107881 |
40.01 |
| 2026-03-31 12:00 |
21:50:59.70 |
-31:50:34.4 |
HIP 107881 |
42.00 |
| 2026-04-01 00:00 |
21:51:12.68 |
-31:47:59.8 |
HIP 107881 |
44.22 |
| 2026-04-01 12:00 |
21:51:25.50 |
-31:45:26.4 |
HIP 107881 |
46.61 |
| 2026-04-02 00:00 |
21:51:38.16 |
-31:42:54.1 |
HIP 108184 |
44.36 |
| 2026-04-02 12:00 |
21:51:50.66 |
-31:40:22.9 |
HIP 108184 |
42.10 |
| 2026-04-03 00:00 |
21:52:03.01 |
-31:37:52.8 |
HIP 108184 |
40.07 |
| 2026-04-03 12:00 |
21:52:15.19 |
-31:35:23.8 |
HIP 108184 |
38.31 |
| 2026-04-04 00:00 |
21:52:27.22 |
-31:32:56.0 |
HIP 108185 |
35.32 |
| 2026-04-04 12:00 |
21:52:39.08 |
-31:30:29.3 |
HIP 108185 |
32.24 |
| 2026-04-05 00:00 |
21:52:50.78 |
-31:28:03.7 |
HIP 108185 |
29.29 |
| 2026-04-05 12:00 |
21:53:02.32 |
-31:25:39.3 |
HIP 108185 |
26.50 |
| 2026-04-06 00:00 |
21:53:13.69 |
-31:23:16.0 |
HIP 108185 |
23.92 |
| 2026-04-06 12:00 |
21:53:24.90 |
-31:20:53.8 |
HIP 108185 |
21.59 |
| 2026-04-07 00:00 |
21:53:35.94 |
-31:18:32.7 |
HIP 108185 |
19.61 |
| 2026-04-07 12:00 |
21:53:46.81 |
-31:16:12.7 |
HIP 108185 |
18.05 |
| 2026-04-08 00:00 |
21:53:57.52 |
-31:13:53.9 |
HIP 108185 |
17.00 |
| 2026-04-08 12:00 |
21:54:08.06 |
-31:11:36.2 |
HIP 108185 |
16.56 |
| 2026-04-09 00:00 |
21:54:18.43 |
-31:09:19.7 |
HIP 108185 |
16.74 |
| 2026-04-09 12:00 |
21:54:28.63 |
-31:07:04.3 |
HIP 108185 |
17.50 |
| 2026-04-10 00:00 |
21:54:38.65 |
-31:04:50.0 |
HIP 108185 |
18.75 |
| 2026-04-10 12:00 |
21:54:48.51 |
-31:02:36.8 |
HIP 108264 |
16.91 |
| 2026-04-11 00:00 |
21:54:58.19 |
-31:00:24.8 |
HIP 108264 |
14.14 |
| 2026-04-11 12:00 |
21:55:07.69 |
-30:58:13.9 |
HIP 108264 |
11.54 |
| 2026-04-12 00:00 |
21:55:17.03 |
-30:56:04.2 |
HIP 108264 |
9.21 |
| 2026-04-12 12:00 |
21:55:26.18 |
-30:53:55.6 |
HIP 108264 |
7.37 |
| 2026-04-13 00:00 |
21:55:35.16 |
-30:51:48.1 |
HIP 108264 |
6.41 |
| 2026-04-13 12:00 |
21:55:43.95 |
-30:49:41.8 |
HIP 108264 |
6.65 |
| 2026-04-14 00:00 |
21:55:52.57 |
-30:47:36.6 |
HIP 108264 |
7.95 |
| 2026-04-14 12:00 |
21:56:01.01 |
-30:45:32.5 |
HIP 108259 |
9.26 |
| 2026-04-15 00:00 |
21:56:09.26 |
-30:43:29.6 |
HIP 108259 |
7.72 |
| 2026-04-15 12:00 |
21:56:17.34 |
-30:41:27.8 |
HIP 108259 |
6.93 |
| 2026-04-16 00:00 |
21:56:25.23 |
-30:39:27.2 |
HIP 108259 |
7.09 |