メタデータ
| 項目 |
値 |
| Designation |
C/2024 Q4 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-11-11T17:40:59.986560Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:42:40Z |
| Obs used |
48 |
| NEO |
- |
| M1 |
10.000 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-08-31T14:37:17.472000Z |
| Discovery magnitude (MPC) |
21.16 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-10-29.0000000 |
| e |
0.99600257 |
| q (au) |
5.418751 |
| a (au) |
1355.557776 |
| i (deg) |
3.309199 |
| Ω (om, deg) |
324.348085 |
| ω (w, deg) |
132.914334 |
| M (ma, deg) |
359.999729 |
等級
散乱 + 全体線形
$$
M_a = (5.808 + 5.920\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.808 |
| n |
5.920 |
| gf |
0.923 |
| gb |
-0.926 |
| k |
1.000 |
| δ90 |
5.584 |
| 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 |
10:45:50.14 |
+07:05:59.3 |
HIP 52598 |
11.39 |
| 2026-09-20 12:00 |
10:46:08.63 |
+07:04:00.3 |
HIP 52598 |
13.88 |
| 2026-09-21 00:00 |
10:46:27.09 |
+07:02:01.5 |
HIP 52598 |
17.48 |
| 2026-09-21 12:00 |
10:46:45.52 |
+07:00:02.8 |
HIP 52598 |
21.63 |
| 2026-09-22 00:00 |
10:47:03.90 |
+06:58:04.3 |
HIP 52837 |
20.17 |
| 2026-09-22 12:00 |
10:47:22.25 |
+06:56:05.9 |
HIP 52837 |
15.27 |
| 2026-09-23 00:00 |
10:47:40.56 |
+06:54:07.6 |
HIP 52837 |
10.46 |
| 2026-09-23 12:00 |
10:47:58.84 |
+06:52:09.5 |
HIP 52837 |
5.89 |
| 2026-09-24 00:00 |
10:48:17.07 |
+06:50:11.6 |
HIP 52837 |
2.97 |
| 2026-09-24 12:00 |
10:48:35.27 |
+06:48:13.8 |
HIP 52837 |
5.62 |
| 2026-09-25 00:00 |
10:48:53.42 |
+06:46:16.2 |
HIP 52917 |
7.36 |
| 2026-09-25 12:00 |
10:49:11.54 |
+06:44:18.7 |
HIP 52917 |
2.64 |
| 2026-09-26 00:00 |
10:49:29.61 |
+06:42:21.4 |
HIP 52917 |
2.80 |
| 2026-09-26 12:00 |
10:49:47.65 |
+06:40:24.3 |
HIP 52917 |
7.52 |
| 2026-09-27 00:00 |
10:50:05.64 |
+06:38:27.3 |
HIP 52917 |
12.36 |
| 2026-09-27 12:00 |
10:50:23.59 |
+06:36:30.5 |
HIP 53020 |
14.07 |
| 2026-09-28 00:00 |
10:50:41.50 |
+06:34:33.9 |
HIP 53020 |
14.31 |
| 2026-09-28 12:00 |
10:50:59.37 |
+06:32:37.5 |
HIP 53020 |
16.07 |
| 2026-09-29 00:00 |
10:51:17.19 |
+06:30:41.3 |
HIP 53020 |
18.94 |
| 2026-09-29 12:00 |
10:51:34.97 |
+06:28:45.2 |
HIP 53020 |
22.48 |
| 2026-09-30 00:00 |
10:51:52.70 |
+06:26:49.4 |
HIP 53020 |
26.42 |
| 2026-09-30 12:00 |
10:52:10.39 |
+06:24:53.7 |
HIP 53020 |
30.60 |
| 2026-10-01 00:00 |
10:52:28.04 |
+06:22:58.2 |
HIP 53020 |
34.92 |
| 2026-10-01 12:00 |
10:52:45.63 |
+06:21:03.0 |
HIP 53020 |
39.35 |
| 2026-10-02 00:00 |
10:53:03.19 |
+06:19:07.9 |
HIP 53362 |
38.03 |
| 2026-10-02 12:00 |
10:53:20.69 |
+06:17:13.1 |
HIP 53362 |
33.76 |
| 2026-10-03 00:00 |
10:53:38.15 |
+06:15:18.5 |
HIP 53362 |
29.63 |
| 2026-10-03 12:00 |
10:53:55.56 |
+06:13:24.1 |
HIP 53362 |
25.73 |
| 2026-10-04 00:00 |
10:54:12.92 |
+06:11:29.9 |
HIP 53362 |
22.17 |
| 2026-10-04 12:00 |
10:54:30.23 |
+06:09:35.9 |
HIP 53362 |
19.11 |
| 2026-10-05 00:00 |
10:54:47.50 |
+06:07:42.2 |
HIP 53362 |
16.84 |
| 2026-10-05 12:00 |
10:55:04.71 |
+06:05:48.7 |
HIP 53449 |
15.08 |
| 2026-10-06 00:00 |
10:55:21.87 |
+06:03:55.5 |
HIP 53449 |
12.20 |
| 2026-10-06 12:00 |
10:55:38.98 |
+06:02:02.5 |
HIP 53449 |
10.67 |
| 2026-10-07 00:00 |
10:55:56.04 |
+06:00:09.7 |
HIP 53449 |
11.04 |
| 2026-10-07 12:00 |
10:56:13.05 |
+05:58:17.2 |
HIP 53449 |
13.15 |
| 2026-10-08 00:00 |
10:56:30.00 |
+05:56:25.0 |
HIP 53449 |
16.33 |
| 2026-10-08 12:00 |
10:56:46.90 |
+05:54:33.0 |
HIP 53513 |
16.68 |
| 2026-10-09 00:00 |
10:57:03.74 |
+05:52:41.3 |
HIP 53513 |
15.17 |
| 2026-10-09 12:00 |
10:57:20.53 |
+05:50:49.9 |
HIP 53513 |
14.97 |
| 2026-10-10 00:00 |
10:57:37.26 |
+05:48:58.7 |
HIP 53513 |
16.11 |
| 2026-10-10 12:00 |
10:57:53.94 |
+05:47:07.8 |
HIP 53513 |
18.33 |
| 2026-10-11 00:00 |
10:58:10.56 |
+05:45:17.2 |
HIP 53513 |
21.29 |