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) |
| 2026-09-20 00:00 |
13:45:25.59 |
-03:17:38.1 |
HIP 67099 |
3.99 |
| 2026-09-20 12:00 |
13:45:50.63 |
-03:21:03.4 |
HIP 67099 |
10.25 |
| 2026-09-21 00:00 |
13:46:15.71 |
-03:24:28.5 |
HIP 67099 |
17.21 |
| 2026-09-21 12:00 |
13:46:40.83 |
-03:27:53.4 |
HIP 67099 |
24.28 |
| 2026-09-22 00:00 |
13:47:06.00 |
-03:31:18.1 |
HIP 67387 |
23.49 |
| 2026-09-22 12:00 |
13:47:31.21 |
-03:34:42.5 |
HIP 67387 |
17.18 |
| 2026-09-23 00:00 |
13:47:56.47 |
-03:38:06.7 |
HIP 67387 |
11.85 |
| 2026-09-23 12:00 |
13:48:21.76 |
-03:41:30.7 |
HIP 67387 |
9.39 |
| 2026-09-24 00:00 |
13:48:47.10 |
-03:44:54.4 |
HIP 67387 |
11.78 |
| 2026-09-24 12:00 |
13:49:12.48 |
-03:48:17.8 |
HIP 67387 |
17.09 |
| 2026-09-25 00:00 |
13:49:37.89 |
-03:51:41.0 |
HIP 67387 |
23.43 |
| 2026-09-25 12:00 |
13:50:03.35 |
-03:55:04.0 |
HIP 67387 |
30.15 |
| 2026-09-26 00:00 |
13:50:28.85 |
-03:58:26.7 |
HIP 67387 |
37.06 |
| 2026-09-26 12:00 |
13:50:54.39 |
-04:01:49.2 |
HIP 67387 |
44.06 |
| 2026-09-27 00:00 |
13:51:19.96 |
-04:05:11.4 |
HIP 67785 |
43.01 |
| 2026-09-27 12:00 |
13:51:45.57 |
-04:08:33.3 |
HIP 67785 |
42.00 |
| 2026-09-28 00:00 |
13:52:11.22 |
-04:11:55.0 |
HIP 67931 |
40.80 |
| 2026-09-28 12:00 |
13:52:36.91 |
-04:15:16.4 |
HIP 67931 |
33.61 |
| 2026-09-29 00:00 |
13:53:02.63 |
-04:18:37.6 |
HIP 67931 |
26.43 |
| 2026-09-29 12:00 |
13:53:28.39 |
-04:21:58.4 |
HIP 67931 |
19.28 |
| 2026-09-30 00:00 |
13:53:54.18 |
-04:25:19.0 |
HIP 67931 |
12.24 |
| 2026-09-30 12:00 |
13:54:20.01 |
-04:28:39.4 |
HIP 67931 |
5.74 |
| 2026-10-01 00:00 |
13:54:45.87 |
-04:31:59.4 |
HIP 67931 |
4.60 |
| 2026-10-01 12:00 |
13:55:11.77 |
-04:35:19.2 |
HIP 67931 |
10.71 |
| 2026-10-02 00:00 |
13:55:37.70 |
-04:38:38.7 |
HIP 67991 |
16.61 |
| 2026-10-02 12:00 |
13:56:03.66 |
-04:41:57.9 |
HIP 67991 |
21.86 |
| 2026-10-03 00:00 |
13:56:29.66 |
-04:45:16.8 |
HIP 67991 |
28.03 |
| 2026-10-03 12:00 |
13:56:55.69 |
-04:48:35.4 |
HIP 68221 |
29.84 |
| 2026-10-04 00:00 |
13:57:21.75 |
-04:51:53.7 |
HIP 68221 |
30.15 |
| 2026-10-04 12:00 |
13:57:47.84 |
-04:55:11.7 |
HIP 68221 |
32.14 |
| 2026-10-05 00:00 |
13:58:13.96 |
-04:58:29.5 |
HIP 68192 |
31.57 |
| 2026-10-05 12:00 |
13:58:40.11 |
-05:01:46.9 |
HIP 68348 |
26.42 |
| 2026-10-06 00:00 |
13:59:06.29 |
-05:05:04.0 |
HIP 68348 |
21.02 |
| 2026-10-06 12:00 |
13:59:32.50 |
-05:08:20.8 |
HIP 68348 |
17.10 |
| 2026-10-07 00:00 |
13:59:58.74 |
-05:11:37.3 |
HIP 68452 |
13.06 |
| 2026-10-07 12:00 |
14:00:25.01 |
-05:14:53.5 |
HIP 68452 |
6.85 |
| 2026-10-08 00:00 |
14:00:51.30 |
-05:18:09.3 |
HIP 68452 |
5.49 |
| 2026-10-08 12:00 |
14:01:17.62 |
-05:21:24.8 |
HIP 68452 |
10.97 |
| 2026-10-09 00:00 |
14:01:43.96 |
-05:24:40.0 |
HIP 68524 |
15.32 |
| 2026-10-09 12:00 |
14:02:10.33 |
-05:27:54.8 |
HIP 68592 |
12.16 |
| 2026-10-10 00:00 |
14:02:36.72 |
-05:31:09.4 |
HIP 68592 |
8.04 |
| 2026-10-10 12:00 |
14:03:03.14 |
-05:34:23.5 |
HIP 68592 |
9.43 |
| 2026-10-11 00:00 |
14:03:29.57 |
-05:37:37.4 |
HIP 68592 |
14.86 |