メタデータ
| 項目 |
値 |
| Designation |
C/2024 G1 (Wierzchos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-10-21T02:22:13.702080Z |
| Orbit solution date (soln_date, UTC) |
2025-05-08T09:42:17Z |
| Obs used |
112 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
16.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-07-09.0000000 |
| e |
0.96744521 |
| q (au) |
3.930143 |
| a (au) |
120.723934 |
| i (deg) |
95.400994 |
| Ω (om, deg) |
30.599798 |
| ω (w, deg) |
128.228357 |
| M (ma, deg) |
359.922650 |
等級
散乱 + 全体線形
$$
M_a = (7.233 + 5.712\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.233 |
| n |
5.712 |
| gf |
0.958 |
| gb |
-0.521 |
| 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) |
| 2026-09-20 00:00 |
12:39:06.13 |
-33:39:27.7 |
HIP 61757 |
10.23 |
| 2026-09-20 12:00 |
12:39:18.72 |
-33:41:44.3 |
HIP 61757 |
7.26 |
| 2026-09-21 00:00 |
12:39:31.33 |
-33:44:01.8 |
HIP 61757 |
4.98 |
| 2026-09-21 12:00 |
12:39:43.97 |
-33:46:20.1 |
HIP 61757 |
4.59 |
| 2026-09-22 00:00 |
12:39:56.64 |
-33:48:39.2 |
HIP 61757 |
6.46 |
| 2026-09-22 12:00 |
12:40:09.32 |
-33:50:59.0 |
HIP 61757 |
9.34 |
| 2026-09-23 00:00 |
12:40:22.03 |
-33:53:19.7 |
HIP 61757 |
12.55 |
| 2026-09-23 12:00 |
12:40:34.76 |
-33:55:41.2 |
HIP 61757 |
15.91 |
| 2026-09-24 00:00 |
12:40:47.50 |
-33:58:03.4 |
HIP 61757 |
19.34 |
| 2026-09-24 12:00 |
12:41:00.27 |
-34:00:26.4 |
HIP 61757 |
22.82 |
| 2026-09-25 00:00 |
12:41:13.06 |
-34:02:50.2 |
HIP 61785 |
26.06 |
| 2026-09-25 12:00 |
12:41:25.86 |
-34:05:14.8 |
HIP 62037 |
22.70 |
| 2026-09-26 00:00 |
12:41:38.68 |
-34:07:40.1 |
HIP 62037 |
19.16 |
| 2026-09-26 12:00 |
12:41:51.51 |
-34:10:06.3 |
HIP 62037 |
15.63 |
| 2026-09-27 00:00 |
12:42:04.36 |
-34:12:33.1 |
HIP 62037 |
12.14 |
| 2026-09-27 12:00 |
12:42:17.23 |
-34:15:00.8 |
HIP 62037 |
8.75 |
| 2026-09-28 00:00 |
12:42:30.11 |
-34:17:29.2 |
HIP 62037 |
5.65 |
| 2026-09-28 12:00 |
12:42:43.00 |
-34:19:58.4 |
HIP 62037 |
3.72 |
| 2026-09-29 00:00 |
12:42:55.91 |
-34:22:28.3 |
HIP 62037 |
4.73 |
| 2026-09-29 12:00 |
12:43:08.82 |
-34:24:59.0 |
HIP 62037 |
7.60 |
| 2026-09-30 00:00 |
12:43:21.75 |
-34:27:30.4 |
HIP 62037 |
10.97 |
| 2026-09-30 12:00 |
12:43:34.69 |
-34:30:02.6 |
HIP 62037 |
14.49 |
| 2026-10-01 00:00 |
12:43:47.64 |
-34:32:35.6 |
HIP 62037 |
18.09 |
| 2026-10-01 12:00 |
12:44:00.60 |
-34:35:09.2 |
HIP 62037 |
21.73 |
| 2026-10-02 00:00 |
12:44:13.56 |
-34:37:43.7 |
HIP 62037 |
25.40 |
| 2026-10-02 12:00 |
12:44:26.53 |
-34:40:18.8 |
HIP 62127 |
27.66 |
| 2026-10-03 00:00 |
12:44:39.51 |
-34:42:54.7 |
HIP 62127 |
25.87 |
| 2026-10-03 12:00 |
12:44:52.50 |
-34:45:31.4 |
HIP 62127 |
24.50 |
| 2026-10-04 00:00 |
12:45:05.49 |
-34:48:08.8 |
HIP 62127 |
23.63 |
| 2026-10-04 12:00 |
12:45:18.48 |
-34:50:46.9 |
HIP 62127 |
23.32 |
| 2026-10-05 00:00 |
12:45:31.48 |
-34:53:25.7 |
HIP 62127 |
23.61 |
| 2026-10-05 12:00 |
12:45:44.48 |
-34:56:05.3 |
HIP 62127 |
24.47 |
| 2026-10-06 00:00 |
12:45:57.48 |
-34:58:45.6 |
HIP 62127 |
25.84 |
| 2026-10-06 12:00 |
12:46:10.48 |
-35:01:26.6 |
HIP 62127 |
27.66 |
| 2026-10-07 00:00 |
12:46:23.48 |
-35:04:08.4 |
HIP 62127 |
29.85 |
| 2026-10-07 12:00 |
12:46:36.48 |
-35:06:50.8 |
HIP 62127 |
32.33 |
| 2026-10-08 00:00 |
12:46:49.48 |
-35:09:34.0 |
HIP 62127 |
35.04 |
| 2026-10-08 12:00 |
12:47:02.48 |
-35:12:17.9 |
HIP 62467 |
32.61 |
| 2026-10-09 00:00 |
12:47:15.47 |
-35:15:02.5 |
HIP 62467 |
29.07 |
| 2026-10-09 12:00 |
12:47:28.46 |
-35:17:47.8 |
HIP 62467 |
25.59 |
| 2026-10-10 00:00 |
12:47:41.44 |
-35:20:33.8 |
HIP 62467 |
22.22 |
| 2026-10-10 12:00 |
12:47:54.41 |
-35:23:20.4 |
HIP 62467 |
19.01 |
| 2026-10-11 00:00 |
12:48:07.38 |
-35:26:07.8 |
HIP 62467 |
16.07 |