476P/PANSTARRS
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) |
| 2026-02-03 00:00 |
13:42:01.89 |
+07:25:26.6 |
HIP 66788 |
15.60 |
| 2026-02-03 12:00 |
13:42:05.03 |
+07:26:15.0 |
HIP 66788 |
15.60 |
| 2026-02-04 00:00 |
13:42:07.92 |
+07:27:04.5 |
HIP 66788 |
15.63 |
| 2026-02-04 12:00 |
13:42:10.56 |
+07:27:55.2 |
HIP 66788 |
15.66 |
| 2026-02-05 00:00 |
13:42:12.94 |
+07:28:47.1 |
HIP 66788 |
15.70 |
| 2026-02-05 12:00 |
13:42:15.06 |
+07:29:40.1 |
HIP 66788 |
15.75 |
| 2026-02-06 00:00 |
13:42:16.93 |
+07:30:34.3 |
HIP 66788 |
15.80 |
| 2026-02-06 12:00 |
13:42:18.55 |
+07:31:29.6 |
HIP 66788 |
15.84 |
| 2026-02-07 00:00 |
13:42:19.91 |
+07:32:26.0 |
HIP 66788 |
15.89 |
| 2026-02-07 12:00 |
13:42:21.01 |
+07:33:23.5 |
HIP 66788 |
15.93 |
| 2026-02-08 00:00 |
13:42:21.86 |
+07:34:22.2 |
HIP 66788 |
15.96 |
| 2026-02-08 12:00 |
13:42:22.45 |
+07:35:21.9 |
HIP 66788 |
16.00 |
| 2026-02-09 00:00 |
13:42:22.78 |
+07:36:22.7 |
HIP 66788 |
16.03 |
| 2026-02-09 12:00 |
13:42:22.85 |
+07:37:24.6 |
HIP 66788 |
16.06 |
| 2026-02-10 00:00 |
13:42:22.66 |
+07:38:27.5 |
HIP 66788 |
16.10 |
| 2026-02-10 12:00 |
13:42:22.22 |
+07:39:31.4 |
HIP 66788 |
16.15 |
| 2026-02-11 00:00 |
13:42:21.52 |
+07:40:36.4 |
HIP 66788 |
16.21 |
| 2026-02-11 12:00 |
13:42:20.55 |
+07:41:42.4 |
HIP 66788 |
16.28 |
| 2026-02-12 00:00 |
13:42:19.33 |
+07:42:49.4 |
HIP 66788 |
16.38 |
| 2026-02-12 12:00 |
13:42:17.85 |
+07:43:57.4 |
HIP 66788 |
16.51 |
| 2026-02-13 00:00 |
13:42:16.11 |
+07:45:06.3 |
HIP 66788 |
16.68 |
| 2026-02-13 12:00 |
13:42:14.11 |
+07:46:16.2 |
HIP 66788 |
16.89 |
| 2026-02-14 00:00 |
13:42:11.85 |
+07:47:27.0 |
HIP 66788 |
17.15 |
| 2026-02-14 12:00 |
13:42:09.33 |
+07:48:38.7 |
HIP 66788 |
17.47 |
| 2026-02-15 00:00 |
13:42:06.56 |
+07:49:51.3 |
HIP 66788 |
17.85 |
| 2026-02-15 12:00 |
13:42:03.52 |
+07:51:04.8 |
HIP 66788 |
18.30 |
| 2026-02-16 00:00 |
13:42:00.23 |
+07:52:19.2 |
HIP 66788 |
18.83 |
| 2026-02-16 12:00 |
13:41:56.67 |
+07:53:34.4 |
HIP 66788 |
19.44 |
| 2026-02-17 00:00 |
13:41:52.86 |
+07:54:50.4 |
HIP 66788 |
20.13 |
| 2026-02-17 12:00 |
13:41:48.79 |
+07:56:07.2 |
HIP 66788 |
20.90 |
| 2026-02-18 00:00 |
13:41:44.46 |
+07:57:24.8 |
HIP 66788 |
21.77 |
| 2026-02-18 12:00 |
13:41:39.88 |
+07:58:43.2 |
HIP 66788 |
22.72 |
| 2026-02-19 00:00 |
13:41:35.04 |
+08:00:02.4 |
HIP 66788 |
23.77 |
| 2026-02-19 12:00 |
13:41:29.95 |
+08:01:22.2 |
HIP 66860 |
24.39 |
| 2026-02-20 00:00 |
13:41:24.60 |
+08:02:42.8 |
HIP 66860 |
23.83 |
| 2026-02-20 12:00 |
13:41:19.00 |
+08:04:04.0 |
HIP 66860 |
23.43 |
| 2026-02-21 00:00 |
13:41:13.14 |
+08:05:25.9 |
HIP 66860 |
23.22 |
| 2026-02-21 12:00 |
13:41:07.03 |
+08:06:48.5 |
HIP 66860 |
23.21 |
| 2026-02-22 00:00 |
13:41:00.68 |
+08:08:11.6 |
HIP 66860 |
23.42 |
| 2026-02-22 12:00 |
13:40:54.07 |
+08:09:35.4 |
HIP 66860 |
23.87 |
| 2026-02-23 00:00 |
13:40:47.21 |
+08:10:59.7 |
HIP 66860 |
24.54 |
| 2026-02-23 12:00 |
13:40:40.10 |
+08:12:24.6 |
HIP 66860 |
25.43 |
| 2026-02-24 00:00 |
13:40:32.75 |
+08:13:50.0 |
HIP 66860 |
26.55 |