メタデータ
| 項目 |
値 |
| Designation |
476P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-11-06T11:32:30.192000Z |
| Orbit solution date (soln_date, UTC) |
2025-04-11T14:45:20Z |
| Obs used |
97 |
| NEO |
- |
| M1 |
16.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-11-19T03:35:47.472000Z |
| Discovery magnitude (MPC) |
20.40 G |
| Discovery observatory (MPC) |
W62 · Comet Hunter Observatory2, New Ringgold |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-12-05.0000000 |
| e |
0.34832867 |
| q (au) |
3.099035 |
| a (au) |
4.755519 |
| i (deg) |
18.863111 |
| Ω (om, deg) |
59.248376 |
| ω (w, deg) |
47.238057 |
| M (ma, deg) |
189.072051 |
等級
散乱 + 全体線形
$$
M_a = (19.885 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.885 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.813 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
13:26:45.23 |
+09:40:43.4 |
HIP 65625 |
10.96 |
| 2026-03-26 12:00 |
13:26:26.55 |
+09:41:55.7 |
HIP 65625 |
14.09 |
| 2026-03-27 00:00 |
13:26:07.78 |
+09:43:07.1 |
HIP 65490 |
12.77 |
| 2026-03-27 12:00 |
13:25:48.92 |
+09:44:17.4 |
HIP 65490 |
9.55 |
| 2026-03-28 00:00 |
13:25:29.98 |
+09:45:26.6 |
HIP 65490 |
8.06 |
| 2026-03-28 12:00 |
13:25:10.95 |
+09:46:34.8 |
HIP 65490 |
9.21 |
| 2026-03-29 00:00 |
13:24:51.85 |
+09:47:41.9 |
HIP 65490 |
12.29 |
| 2026-03-29 12:00 |
13:24:32.67 |
+09:48:47.8 |
HIP 65490 |
16.25 |
| 2026-03-30 00:00 |
13:24:13.43 |
+09:49:52.7 |
HIP 65496 |
20.55 |
| 2026-03-30 12:00 |
13:23:54.11 |
+09:50:56.4 |
HIP 65496 |
24.29 |
| 2026-03-31 00:00 |
13:23:34.73 |
+09:51:58.9 |
HIP 65496 |
28.40 |
| 2026-03-31 12:00 |
13:23:15.30 |
+09:53:00.2 |
HIP 65496 |
32.74 |
| 2026-04-01 00:00 |
13:22:55.81 |
+09:54:00.3 |
HIP 65133 |
30.98 |
| 2026-04-01 12:00 |
13:22:36.26 |
+09:54:59.1 |
HIP 65133 |
26.12 |
| 2026-04-02 00:00 |
13:22:16.67 |
+09:55:56.8 |
HIP 65133 |
21.28 |
| 2026-04-02 12:00 |
13:21:57.04 |
+09:56:53.1 |
HIP 65133 |
16.46 |
| 2026-04-03 00:00 |
13:21:37.36 |
+09:57:48.2 |
HIP 65133 |
11.73 |
| 2026-04-03 12:00 |
13:21:17.65 |
+09:58:42.0 |
HIP 65133 |
7.26 |
| 2026-04-04 00:00 |
13:20:57.90 |
+09:59:34.4 |
HIP 65133 |
4.04 |
| 2026-04-04 12:00 |
13:20:38.13 |
+10:00:25.5 |
HIP 65133 |
5.35 |
| 2026-04-05 00:00 |
13:20:18.33 |
+10:01:15.3 |
HIP 65055 |
3.32 |
| 2026-04-05 12:00 |
13:19:58.50 |
+10:02:03.7 |
HIP 65055 |
2.73 |
| 2026-04-06 00:00 |
13:19:38.66 |
+10:02:50.7 |
HIP 65055 |
7.26 |
| 2026-04-06 12:00 |
13:19:18.81 |
+10:03:36.2 |
HIP 65055 |
12.12 |
| 2026-04-07 00:00 |
13:18:58.94 |
+10:04:20.4 |
HIP 65055 |
17.02 |
| 2026-04-07 12:00 |
13:18:39.07 |
+10:05:03.1 |
HIP 65055 |
21.94 |
| 2026-04-08 00:00 |
13:18:19.20 |
+10:05:44.4 |
HIP 65055 |
26.87 |
| 2026-04-08 12:00 |
13:17:59.32 |
+10:06:24.2 |
HIP 65055 |
31.79 |
| 2026-04-09 00:00 |
13:17:39.46 |
+10:07:02.5 |
HIP 64707 |
29.48 |
| 2026-04-09 12:00 |
13:17:19.60 |
+10:07:39.4 |
HIP 64707 |
24.62 |
| 2026-04-10 00:00 |
13:16:59.75 |
+10:08:14.7 |
HIP 64707 |
19.81 |
| 2026-04-10 12:00 |
13:16:39.92 |
+10:08:48.4 |
HIP 64707 |
15.07 |
| 2026-04-11 00:00 |
13:16:20.11 |
+10:09:20.7 |
HIP 64707 |
10.52 |
| 2026-04-11 12:00 |
13:16:00.32 |
+10:09:51.4 |
HIP 64707 |
6.53 |
| 2026-04-12 00:00 |
13:15:40.57 |
+10:10:20.5 |
HIP 64707 |
4.77 |
| 2026-04-12 12:00 |
13:15:20.84 |
+10:10:48.0 |
HIP 64707 |
7.12 |
| 2026-04-13 00:00 |
13:15:01.15 |
+10:11:13.9 |
HIP 64707 |
11.23 |
| 2026-04-13 12:00 |
13:14:41.50 |
+10:11:38.2 |
HIP 64707 |
15.78 |
| 2026-04-14 00:00 |
13:14:21.89 |
+10:12:00.9 |
HIP 64707 |
20.46 |
| 2026-04-14 12:00 |
13:14:02.33 |
+10:12:22.0 |
HIP 64707 |
25.19 |
| 2026-04-15 00:00 |
13:13:42.82 |
+10:12:41.4 |
HIP 64566 |
26.75 |
| 2026-04-15 12:00 |
13:13:23.36 |
+10:12:59.2 |
HIP 64566 |
28.34 |
| 2026-04-16 00:00 |
13:13:03.97 |
+10:13:15.3 |
HIP 64566 |
30.58 |