メタデータ
| 項目 |
値 |
| Designation |
441P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-09-07T17:20:30.799680Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:49Z |
| Obs used |
204 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-01-25T12:16:34.464000Z |
| Discovery magnitude (MPC) |
22.11 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-01-23.0000000 |
| e |
0.19560717 |
| q (au) |
3.326113 |
| a (au) |
4.134936 |
| i (deg) |
2.574094 |
| Ω (om, deg) |
143.611657 |
| ω (w, deg) |
178.713774 |
| M (ma, deg) |
204.833512 |
等級
散乱 + 全体線形
$$
M_a = (16.395 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.395 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.786 |
| k |
0.966 |
| 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 |
00:55:35.36 |
+04:26:30.6 |
HIP 4352 |
5.27 |
| 2026-05-12 12:00 |
00:56:10.77 |
+04:29:58.0 |
HIP 4352 |
5.65 |
| 2026-05-13 00:00 |
00:56:46.12 |
+04:33:24.8 |
HIP 4352 |
14.67 |
| 2026-05-13 12:00 |
00:57:21.42 |
+04:36:50.9 |
HIP 4557 |
23.82 |
| 2026-05-14 00:00 |
00:57:56.65 |
+04:40:16.5 |
HIP 4557 |
23.15 |
| 2026-05-14 12:00 |
00:58:31.82 |
+04:43:41.4 |
HIP 4557 |
26.10 |
| 2026-05-15 00:00 |
00:59:06.92 |
+04:47:05.6 |
HIP 4737 |
26.01 |
| 2026-05-15 12:00 |
00:59:41.97 |
+04:50:29.3 |
HIP 4737 |
17.12 |
| 2026-05-16 00:00 |
01:00:16.95 |
+04:53:52.2 |
HIP 4737 |
9.24 |
| 2026-05-16 12:00 |
01:00:51.87 |
+04:57:14.6 |
HIP 4737 |
7.21 |
| 2026-05-17 00:00 |
01:01:26.72 |
+05:00:36.2 |
HIP 4790 |
7.58 |
| 2026-05-17 12:00 |
01:02:01.50 |
+05:03:57.3 |
HIP 4849 |
5.70 |
| 2026-05-18 00:00 |
01:02:36.22 |
+05:07:17.6 |
HIP 4849 |
4.69 |
| 2026-05-18 12:00 |
01:03:10.88 |
+05:10:37.3 |
HIP 4968 |
8.21 |
| 2026-05-19 00:00 |
01:03:45.46 |
+05:13:56.3 |
HIP 4968 |
1.20 |
| 2026-05-19 12:00 |
01:04:19.98 |
+05:17:14.6 |
HIP 4968 |
10.26 |
| 2026-05-20 00:00 |
01:04:54.42 |
+05:20:32.2 |
HIP 5074 |
18.85 |
| 2026-05-20 12:00 |
01:05:28.80 |
+05:23:49.1 |
HIP 5074 |
17.98 |
| 2026-05-21 00:00 |
01:06:03.11 |
+05:27:05.4 |
HIP 5074 |
21.42 |
| 2026-05-21 12:00 |
01:06:37.34 |
+05:30:20.9 |
HIP 5346 |
27.53 |
| 2026-05-22 00:00 |
01:07:11.51 |
+05:33:35.7 |
HIP 5346 |
18.44 |
| 2026-05-22 12:00 |
01:07:45.60 |
+05:36:49.9 |
HIP 5346 |
9.40 |
| 2026-05-23 00:00 |
01:08:19.62 |
+05:40:03.3 |
HIP 5346 |
1.24 |
| 2026-05-23 12:00 |
01:08:53.56 |
+05:43:16.0 |
HIP 5346 |
8.85 |
| 2026-05-24 00:00 |
01:09:27.43 |
+05:46:28.0 |
HIP 5346 |
17.82 |
| 2026-05-24 12:00 |
01:10:01.23 |
+05:49:39.2 |
HIP 5432 |
24.50 |
| 2026-05-25 00:00 |
01:10:34.95 |
+05:52:49.8 |
HIP 5432 |
31.13 |
| 2026-05-25 12:00 |
01:11:08.60 |
+05:55:59.6 |
HIP 5432 |
38.68 |
| 2026-05-26 00:00 |
01:11:42.17 |
+05:59:08.7 |
HIP 5655 |
39.11 |
| 2026-05-26 12:00 |
01:12:15.67 |
+06:02:17.0 |
HIP 5655 |
33.83 |
| 2026-05-27 00:00 |
01:12:49.08 |
+06:05:24.6 |
HIP 5655 |
30.30 |
| 2026-05-27 12:00 |
01:13:22.42 |
+06:08:31.5 |
HIP 5655 |
29.15 |
| 2026-05-28 00:00 |
01:13:55.68 |
+06:11:37.6 |
HIP 5655 |
30.62 |
| 2026-05-28 12:00 |
01:14:28.87 |
+06:14:43.0 |
HIP 5655 |
34.36 |
| 2026-05-29 00:00 |
01:15:01.97 |
+06:17:47.6 |
HIP 5655 |
39.72 |
| 2026-05-29 12:00 |
01:15:34.99 |
+06:20:51.4 |
HIP 5980 |
34.21 |
| 2026-05-30 00:00 |
01:16:07.94 |
+06:23:54.5 |
HIP 5980 |
27.41 |
| 2026-05-30 12:00 |
01:16:40.80 |
+06:26:56.9 |
HIP 5980 |
22.04 |
| 2026-05-31 00:00 |
01:17:13.58 |
+06:29:58.4 |
HIP 5980 |
19.28 |
| 2026-05-31 12:00 |
01:17:46.27 |
+06:32:59.2 |
HIP 5980 |
20.21 |
| 2026-06-01 00:00 |
01:18:18.89 |
+06:35:59.2 |
HIP 5980 |
24.39 |
| 2026-06-01 12:00 |
01:18:51.42 |
+06:38:58.5 |
HIP 5980 |
30.48 |
| 2026-06-02 00:00 |
01:19:23.87 |
+06:41:56.9 |
HIP 6220 |
32.65 |