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 · University of Arizona 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
12:14:29.45 |
+06:28:43.7 |
HIP 59643 |
27.92 |
| 2026-06-03 00:00 |
12:14:28.03 |
+06:28:06.8 |
HIP 59643 |
28.40 |
| 2026-06-03 12:00 |
12:14:26.73 |
+06:27:29.1 |
HIP 59643 |
28.90 |
| 2026-06-04 00:00 |
12:14:25.55 |
+06:26:50.6 |
HIP 59643 |
29.44 |
| 2026-06-04 12:00 |
12:14:24.48 |
+06:26:11.5 |
HIP 59643 |
30.00 |
| 2026-06-05 00:00 |
12:14:23.54 |
+06:25:31.5 |
HIP 59840 |
30.33 |
| 2026-06-05 12:00 |
12:14:22.71 |
+06:24:50.9 |
HIP 59840 |
30.26 |
| 2026-06-06 00:00 |
12:14:22.00 |
+06:24:09.5 |
HIP 59840 |
30.17 |
| 2026-06-06 12:00 |
12:14:21.41 |
+06:23:27.4 |
HIP 59840 |
30.06 |
| 2026-06-07 00:00 |
12:14:20.94 |
+06:22:44.6 |
HIP 59840 |
29.94 |
| 2026-06-07 12:00 |
12:14:20.58 |
+06:22:01.0 |
HIP 59840 |
29.81 |
| 2026-06-08 00:00 |
12:14:20.34 |
+06:21:16.7 |
HIP 59840 |
29.66 |
| 2026-06-08 12:00 |
12:14:20.22 |
+06:20:31.7 |
HIP 59840 |
29.50 |
| 2026-06-09 00:00 |
12:14:20.22 |
+06:19:46.0 |
HIP 59840 |
29.33 |
| 2026-06-09 12:00 |
12:14:20.34 |
+06:18:59.5 |
HIP 59840 |
29.14 |
| 2026-06-10 00:00 |
12:14:20.57 |
+06:18:12.4 |
HIP 59840 |
28.94 |
| 2026-06-10 12:00 |
12:14:20.92 |
+06:17:24.5 |
HIP 59840 |
28.73 |
| 2026-06-11 00:00 |
12:14:21.39 |
+06:16:36.0 |
HIP 59840 |
28.52 |
| 2026-06-11 12:00 |
12:14:21.97 |
+06:15:46.7 |
HIP 59840 |
28.29 |
| 2026-06-12 00:00 |
12:14:22.67 |
+06:14:56.8 |
HIP 59840 |
28.06 |
| 2026-06-12 12:00 |
12:14:23.49 |
+06:14:06.1 |
HIP 59840 |
27.82 |
| 2026-06-13 00:00 |
12:14:24.42 |
+06:13:14.8 |
HIP 59840 |
27.58 |
| 2026-06-13 12:00 |
12:14:25.47 |
+06:12:22.8 |
HIP 59840 |
27.34 |
| 2026-06-14 00:00 |
12:14:26.64 |
+06:11:30.0 |
HIP 59840 |
27.10 |
| 2026-06-14 12:00 |
12:14:27.92 |
+06:10:36.6 |
HIP 59840 |
26.86 |
| 2026-06-15 00:00 |
12:14:29.32 |
+06:09:42.6 |
HIP 59840 |
26.62 |
| 2026-06-15 12:00 |
12:14:30.84 |
+06:08:47.8 |
HIP 59840 |
26.39 |
| 2026-06-16 00:00 |
12:14:32.47 |
+06:07:52.4 |
HIP 59840 |
26.17 |
| 2026-06-16 12:00 |
12:14:34.21 |
+06:06:56.3 |
HIP 59840 |
25.97 |
| 2026-06-17 00:00 |
12:14:36.07 |
+06:05:59.5 |
HIP 59840 |
25.78 |
| 2026-06-17 12:00 |
12:14:38.04 |
+06:05:02.1 |
HIP 59840 |
25.60 |
| 2026-06-18 00:00 |
12:14:40.13 |
+06:04:04.1 |
HIP 59840 |
25.45 |
| 2026-06-18 12:00 |
12:14:42.33 |
+06:03:05.3 |
HIP 59840 |
25.33 |
| 2026-06-19 00:00 |
12:14:44.65 |
+06:02:06.0 |
HIP 59840 |
25.23 |
| 2026-06-19 12:00 |
12:14:47.07 |
+06:01:06.0 |
HIP 59840 |
25.16 |
| 2026-06-20 00:00 |
12:14:49.61 |
+06:00:05.4 |
HIP 59840 |
25.14 |
| 2026-06-20 12:00 |
12:14:52.26 |
+05:59:04.1 |
HIP 59840 |
25.15 |
| 2026-06-21 00:00 |
12:14:55.03 |
+05:58:02.2 |
HIP 59816 |
25.18 |
| 2026-06-21 12:00 |
12:14:57.90 |
+05:56:59.7 |
HIP 59816 |
23.92 |
| 2026-06-22 00:00 |
12:15:00.88 |
+05:55:56.6 |
HIP 59816 |
22.64 |