メタデータ
| 項目 |
値 |
| Designation |
P/2022 W1 (Rankin) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-09-15T16:21:11.352960Z |
| Orbit solution date (soln_date, UTC) |
2023-02-13T23:14:02Z |
| Obs used |
111 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-11-18T06:11:50.553600Z |
| Discovery magnitude (MPC) |
19.59 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) |
2022-11-28.0000000 |
| e |
0.51668991 |
| q (au) |
3.367776 |
| a (au) |
6.968147 |
| i (deg) |
13.466326 |
| Ω (om, deg) |
38.816891 |
| ω (w, deg) |
17.777254 |
| M (ma, deg) |
3.928641 |
等級
散乱 + 全体線形
$$
M_a = (14.535 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.535 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.901 |
| 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) |
| 2026-05-12 00:00 |
12:17:22.21 |
+06:42:48.1 |
HIP 59916 |
6.83 |
| 2026-05-12 12:00 |
12:17:15.76 |
+06:42:45.6 |
HIP 59916 |
7.25 |
| 2026-05-13 00:00 |
12:17:09.43 |
+06:42:42.4 |
HIP 59916 |
7.94 |
| 2026-05-13 12:00 |
12:17:03.21 |
+06:42:38.2 |
HIP 59916 |
8.83 |
| 2026-05-14 00:00 |
12:16:57.09 |
+06:42:33.3 |
HIP 59916 |
9.86 |
| 2026-05-14 12:00 |
12:16:51.09 |
+06:42:27.5 |
HIP 59916 |
10.96 |
| 2026-05-15 00:00 |
12:16:45.21 |
+06:42:20.9 |
HIP 59916 |
12.13 |
| 2026-05-15 12:00 |
12:16:39.43 |
+06:42:13.4 |
HIP 59916 |
13.32 |
| 2026-05-16 00:00 |
12:16:33.77 |
+06:42:05.2 |
HIP 59916 |
14.52 |
| 2026-05-16 12:00 |
12:16:28.22 |
+06:41:56.0 |
HIP 59916 |
15.73 |
| 2026-05-17 00:00 |
12:16:22.79 |
+06:41:46.1 |
HIP 59916 |
16.93 |
| 2026-05-17 12:00 |
12:16:17.48 |
+06:41:35.3 |
HIP 59916 |
18.12 |
| 2026-05-18 00:00 |
12:16:12.27 |
+06:41:23.7 |
HIP 59916 |
19.30 |
| 2026-05-18 12:00 |
12:16:07.19 |
+06:41:11.3 |
HIP 59916 |
20.47 |
| 2026-05-19 00:00 |
12:16:02.22 |
+06:40:58.0 |
HIP 59916 |
21.61 |
| 2026-05-19 12:00 |
12:15:57.37 |
+06:40:43.9 |
HIP 59916 |
22.74 |
| 2026-05-20 00:00 |
12:15:52.63 |
+06:40:29.0 |
HIP 59916 |
23.84 |
| 2026-05-20 12:00 |
12:15:48.01 |
+06:40:13.2 |
HIP 59916 |
24.93 |
| 2026-05-21 00:00 |
12:15:43.51 |
+06:39:56.7 |
HIP 59916 |
25.99 |
| 2026-05-21 12:00 |
12:15:39.12 |
+06:39:39.3 |
HIP 59916 |
27.02 |
| 2026-05-22 00:00 |
12:15:34.86 |
+06:39:21.1 |
HIP 59840 |
27.85 |
| 2026-05-22 12:00 |
12:15:30.71 |
+06:39:02.1 |
HIP 59840 |
27.95 |
| 2026-05-23 00:00 |
12:15:26.68 |
+06:38:42.3 |
HIP 59840 |
28.06 |
| 2026-05-23 12:00 |
12:15:22.77 |
+06:38:21.7 |
HIP 59643 |
27.81 |
| 2026-05-24 00:00 |
12:15:18.97 |
+06:38:00.2 |
HIP 59643 |
27.29 |
| 2026-05-24 12:00 |
12:15:15.30 |
+06:37:38.0 |
HIP 59643 |
26.83 |
| 2026-05-25 00:00 |
12:15:11.74 |
+06:37:15.0 |
HIP 59643 |
26.42 |
| 2026-05-25 12:00 |
12:15:08.30 |
+06:36:51.1 |
HIP 59643 |
26.08 |
| 2026-05-26 00:00 |
12:15:04.98 |
+06:36:26.5 |
HIP 59643 |
25.80 |
| 2026-05-26 12:00 |
12:15:01.78 |
+06:36:01.1 |
HIP 59643 |
25.58 |
| 2026-05-27 00:00 |
12:14:58.70 |
+06:35:34.9 |
HIP 59643 |
25.41 |
| 2026-05-27 12:00 |
12:14:55.74 |
+06:35:07.9 |
HIP 59643 |
25.31 |
| 2026-05-28 00:00 |
12:14:52.89 |
+06:34:40.1 |
HIP 59643 |
25.26 |
| 2026-05-28 12:00 |
12:14:50.17 |
+06:34:11.6 |
HIP 59643 |
25.26 |
| 2026-05-29 00:00 |
12:14:47.56 |
+06:33:42.2 |
HIP 59643 |
25.32 |
| 2026-05-29 12:00 |
12:14:45.08 |
+06:33:12.1 |
HIP 59643 |
25.44 |
| 2026-05-30 00:00 |
12:14:42.71 |
+06:32:41.2 |
HIP 59643 |
25.60 |
| 2026-05-30 12:00 |
12:14:40.46 |
+06:32:09.6 |
HIP 59643 |
25.80 |
| 2026-05-31 00:00 |
12:14:38.33 |
+06:31:37.2 |
HIP 59643 |
26.06 |
| 2026-05-31 12:00 |
12:14:36.31 |
+06:31:04.0 |
HIP 59643 |
26.35 |
| 2026-06-01 00:00 |
12:14:34.42 |
+06:30:30.1 |
HIP 59643 |
26.69 |
| 2026-06-01 12:00 |
12:14:32.64 |
+06:29:55.4 |
HIP 59643 |
27.07 |
| 2026-06-02 00:00 |
12:14:30.99 |
+06:29:19.9 |
HIP 59643 |
27.48 |