メタデータ
| 項目 |
値 |
| Designation |
426P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-01-07T12:47:27.709440Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:21Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
17.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-01-08T09:04:12.288000Z |
| Discovery magnitude (MPC) |
20.40 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-10-23.0000000 |
| e |
0.16079592 |
| q (au) |
2.674492 |
| a (au) |
3.186938 |
| i (deg) |
17.774351 |
| Ω (om, deg) |
280.524873 |
| ω (w, deg) |
119.396158 |
| M (ma, deg) |
113.205437 |
等級
散乱 + 全体線形
$$
M_a = (16.705 + 2.066\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.705 |
| n |
2.066 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
13:26:47.48 |
-33:39:23.4 |
HIP 65701 |
18.43 |
| 2026-03-26 12:00 |
13:26:26.06 |
-33:38:50.1 |
HIP 65557 |
21.74 |
| 2026-03-27 00:00 |
13:26:04.48 |
-33:38:13.8 |
HIP 65450 |
19.27 |
| 2026-03-27 12:00 |
13:25:42.74 |
-33:37:34.6 |
HIP 65450 |
15.37 |
| 2026-03-28 00:00 |
13:25:20.85 |
-33:36:52.4 |
HIP 65450 |
11.89 |
| 2026-03-28 12:00 |
13:24:58.81 |
-33:36:07.3 |
HIP 65450 |
9.39 |
| 2026-03-29 00:00 |
13:24:36.63 |
-33:35:19.2 |
HIP 65450 |
8.80 |
| 2026-03-29 12:00 |
13:24:14.31 |
-33:34:28.1 |
HIP 65450 |
10.52 |
| 2026-03-30 00:00 |
13:23:51.86 |
-33:33:34.1 |
HIP 65450 |
13.73 |
| 2026-03-30 12:00 |
13:23:29.27 |
-33:32:37.1 |
HIP 65450 |
17.67 |
| 2026-03-31 00:00 |
13:23:06.57 |
-33:31:37.2 |
HIP 65311 |
20.23 |
| 2026-03-31 12:00 |
13:22:43.75 |
-33:30:34.3 |
HIP 65311 |
19.87 |
| 2026-04-01 00:00 |
13:22:20.81 |
-33:29:28.5 |
HIP 65311 |
20.66 |
| 2026-04-01 12:00 |
13:21:57.76 |
-33:28:19.7 |
HIP 65097 |
21.41 |
| 2026-04-02 00:00 |
13:21:34.62 |
-33:27:08.0 |
HIP 65097 |
18.26 |
| 2026-04-02 12:00 |
13:21:11.37 |
-33:25:53.4 |
HIP 65097 |
16.08 |
| 2026-04-03 00:00 |
13:20:48.03 |
-33:24:35.8 |
HIP 65097 |
15.34 |
| 2026-04-03 12:00 |
13:20:24.61 |
-33:23:15.3 |
HIP 65097 |
16.25 |
| 2026-04-04 00:00 |
13:20:01.10 |
-33:21:52.0 |
HIP 65097 |
18.60 |
| 2026-04-04 12:00 |
13:19:37.52 |
-33:20:25.7 |
HIP 64937 |
19.50 |
| 2026-04-05 00:00 |
13:19:13.86 |
-33:18:56.5 |
HIP 64937 |
15.46 |
| 2026-04-05 12:00 |
13:18:50.14 |
-33:17:24.5 |
HIP 64937 |
12.23 |
| 2026-04-06 00:00 |
13:18:26.36 |
-33:15:49.6 |
HIP 64937 |
10.66 |
| 2026-04-06 12:00 |
13:18:02.52 |
-33:14:11.9 |
HIP 64937 |
11.46 |
| 2026-04-07 00:00 |
13:17:38.64 |
-33:12:31.3 |
HIP 64937 |
14.27 |
| 2026-04-07 12:00 |
13:17:14.71 |
-33:10:47.9 |
HIP 64937 |
18.21 |
| 2026-04-08 00:00 |
13:16:50.74 |
-33:09:01.6 |
HIP 64937 |
22.71 |
| 2026-04-08 12:00 |
13:16:26.74 |
-33:07:12.6 |
HIP 64937 |
27.52 |
| 2026-04-09 00:00 |
13:16:02.71 |
-33:05:20.8 |
HIP 64937 |
32.50 |
| 2026-04-09 12:00 |
13:15:38.66 |
-33:03:26.3 |
HIP 64824 |
34.64 |
| 2026-04-10 00:00 |
13:15:14.59 |
-33:01:29.0 |
HIP 64824 |
36.54 |
| 2026-04-10 12:00 |
13:14:50.52 |
-32:59:29.0 |
HIP 64824 |
39.09 |
| 2026-04-11 00:00 |
13:14:26.44 |
-32:57:26.3 |
HIP 64534 |
40.23 |
| 2026-04-11 12:00 |
13:14:02.36 |
-32:55:20.9 |
HIP 64534 |
37.22 |
| 2026-04-12 00:00 |
13:13:38.29 |
-32:53:12.8 |
HIP 64534 |
34.77 |
| 2026-04-12 12:00 |
13:13:14.23 |
-32:51:02.1 |
HIP 64534 |
33.02 |
| 2026-04-13 00:00 |
13:12:50.18 |
-32:48:48.8 |
HIP 64264 |
31.67 |
| 2026-04-13 12:00 |
13:12:26.17 |
-32:46:33.0 |
HIP 64264 |
26.68 |
| 2026-04-14 00:00 |
13:12:02.18 |
-32:44:14.5 |
HIP 64264 |
21.97 |
| 2026-04-14 12:00 |
13:11:38.23 |
-32:41:53.5 |
HIP 64282 |
17.23 |
| 2026-04-15 00:00 |
13:11:14.32 |
-32:39:30.1 |
HIP 64282 |
11.68 |
| 2026-04-15 12:00 |
13:10:50.46 |
-32:37:04.1 |
HIP 64282 |
6.15 |
| 2026-04-16 00:00 |
13:10:26.65 |
-32:34:35.7 |
HIP 64282 |
1.20 |