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) |
| 2026-05-12 00:00 |
12:58:55.45 |
+09:47:26.4 |
HIP 63295 |
9.42 |
| 2026-05-12 12:00 |
12:58:43.40 |
+09:46:11.5 |
HIP 63295 |
6.28 |
| 2026-05-13 00:00 |
12:58:31.55 |
+09:44:55.1 |
HIP 63295 |
3.34 |
| 2026-05-13 12:00 |
12:58:19.89 |
+09:43:37.0 |
HIP 63295 |
1.84 |
| 2026-05-14 00:00 |
12:58:08.43 |
+09:42:17.4 |
HIP 63295 |
3.92 |
| 2026-05-14 12:00 |
12:57:57.17 |
+09:40:56.1 |
HIP 63295 |
6.83 |
| 2026-05-15 00:00 |
12:57:46.12 |
+09:39:33.3 |
HIP 63295 |
9.82 |
| 2026-05-15 12:00 |
12:57:35.26 |
+09:38:08.9 |
HIP 63295 |
12.81 |
| 2026-05-16 00:00 |
12:57:24.61 |
+09:36:42.9 |
HIP 63295 |
15.79 |
| 2026-05-16 12:00 |
12:57:14.16 |
+09:35:15.4 |
HIP 63267 |
17.56 |
| 2026-05-17 00:00 |
12:57:03.91 |
+09:33:46.3 |
HIP 63173 |
16.36 |
| 2026-05-17 12:00 |
12:56:53.88 |
+09:32:15.7 |
HIP 63173 |
14.03 |
| 2026-05-18 00:00 |
12:56:44.05 |
+09:30:43.6 |
HIP 63173 |
11.92 |
| 2026-05-18 12:00 |
12:56:34.43 |
+09:29:09.9 |
HIP 63173 |
10.17 |
| 2026-05-19 00:00 |
12:56:25.01 |
+09:27:34.7 |
HIP 63173 |
8.96 |
| 2026-05-19 12:00 |
12:56:15.81 |
+09:25:58.0 |
HIP 63173 |
8.48 |
| 2026-05-20 00:00 |
12:56:06.82 |
+09:24:19.8 |
HIP 63173 |
8.84 |
| 2026-05-20 12:00 |
12:55:58.05 |
+09:22:40.2 |
HIP 63173 |
9.92 |
| 2026-05-21 00:00 |
12:55:49.48 |
+09:20:59.1 |
HIP 63173 |
11.51 |
| 2026-05-21 12:00 |
12:55:41.13 |
+09:19:16.5 |
HIP 63173 |
13.40 |
| 2026-05-22 00:00 |
12:55:32.99 |
+09:17:32.5 |
HIP 63173 |
15.47 |
| 2026-05-22 12:00 |
12:55:25.06 |
+09:15:47.0 |
HIP 63173 |
17.65 |
| 2026-05-23 00:00 |
12:55:17.35 |
+09:14:00.2 |
HIP 63174 |
19.82 |
| 2026-05-23 12:00 |
12:55:09.85 |
+09:12:11.9 |
HIP 63174 |
21.32 |
| 2026-05-24 00:00 |
12:55:02.57 |
+09:10:22.2 |
HIP 63174 |
22.95 |
| 2026-05-24 12:00 |
12:54:55.50 |
+09:08:31.2 |
HIP 63174 |
24.69 |
| 2026-05-25 00:00 |
12:54:48.65 |
+09:06:38.8 |
HIP 63174 |
26.51 |
| 2026-05-25 12:00 |
12:54:42.01 |
+09:04:45.0 |
HIP 63174 |
28.39 |
| 2026-05-26 00:00 |
12:54:35.58 |
+09:02:49.9 |
HIP 62879 |
26.53 |
| 2026-05-26 12:00 |
12:54:29.38 |
+09:00:53.5 |
HIP 62879 |
24.12 |
| 2026-05-27 00:00 |
12:54:23.38 |
+08:58:55.7 |
HIP 62879 |
21.74 |
| 2026-05-27 12:00 |
12:54:17.60 |
+08:56:56.6 |
HIP 62879 |
19.42 |
| 2026-05-28 00:00 |
12:54:12.04 |
+08:54:56.2 |
HIP 62879 |
17.17 |
| 2026-05-28 12:00 |
12:54:06.69 |
+08:52:54.6 |
HIP 62879 |
15.01 |
| 2026-05-29 00:00 |
12:54:01.56 |
+08:50:51.6 |
HIP 62879 |
12.98 |
| 2026-05-29 12:00 |
12:53:56.64 |
+08:48:47.5 |
HIP 62879 |
11.15 |
| 2026-05-30 00:00 |
12:53:51.94 |
+08:46:42.0 |
HIP 62879 |
9.63 |
| 2026-05-30 12:00 |
12:53:47.45 |
+08:44:35.3 |
HIP 62879 |
8.57 |
| 2026-05-31 00:00 |
12:53:43.17 |
+08:42:27.4 |
HIP 62879 |
8.15 |
| 2026-05-31 12:00 |
12:53:39.11 |
+08:40:18.3 |
HIP 62879 |
8.47 |
| 2026-06-01 00:00 |
12:53:35.27 |
+08:38:08.0 |
HIP 62879 |
9.44 |
| 2026-06-01 12:00 |
12:53:31.64 |
+08:35:56.4 |
HIP 62879 |
10.89 |
| 2026-06-02 00:00 |
12:53:28.22 |
+08:33:43.7 |
HIP 62879 |
12.66 |