メタデータ
| 項目 |
値 |
| Designation |
P/2022 R1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-10-12T05:04:08.492160Z |
| Orbit solution date (soln_date, UTC) |
2024-06-21T13:42:19Z |
| Obs used |
50 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-01T08:30:18.777600Z |
| Discovery magnitude (MPC) |
20.80 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-12-12.0000000 |
| e |
0.50312159 |
| q (au) |
3.569380 |
| a (au) |
7.183609 |
| i (deg) |
7.408376 |
| Ω (om, deg) |
176.174861 |
| ω (w, deg) |
222.612489 |
| M (ma, deg) |
344.427252 |
等級
散乱 + 全体線形
$$
M_a = (14.019 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.019 |
| n |
2.000 |
| 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) |
| 2026-07-29 00:00 |
09:52:16.79 |
+09:55:59.0 |
HIP 48381 |
10.29 |
| 2026-07-29 12:00 |
09:52:36.23 |
+09:54:29.7 |
HIP 48381 |
13.48 |
| 2026-07-30 00:00 |
09:52:55.68 |
+09:53:00.0 |
HIP 48381 |
17.54 |
| 2026-07-30 12:00 |
09:53:15.14 |
+09:51:30.1 |
HIP 48381 |
22.01 |
| 2026-07-31 00:00 |
09:53:34.62 |
+09:50:00.0 |
HIP 48624 |
20.75 |
| 2026-07-31 12:00 |
09:53:54.12 |
+09:48:29.5 |
HIP 48624 |
16.59 |
| 2026-08-01 00:00 |
09:54:13.63 |
+09:46:58.7 |
HIP 48624 |
13.06 |
| 2026-08-01 12:00 |
09:54:33.15 |
+09:45:27.7 |
HIP 48624 |
10.80 |
| 2026-08-02 00:00 |
09:54:52.68 |
+09:43:56.5 |
HIP 48624 |
10.66 |
| 2026-08-02 12:00 |
09:55:12.23 |
+09:42:24.9 |
HIP 48624 |
12.72 |
| 2026-08-03 00:00 |
09:55:31.79 |
+09:40:53.2 |
HIP 48624 |
16.16 |
| 2026-08-03 12:00 |
09:55:51.36 |
+09:39:21.1 |
HIP 48624 |
20.29 |
| 2026-08-04 00:00 |
09:56:10.94 |
+09:37:48.8 |
HIP 48624 |
24.78 |
| 2026-08-04 12:00 |
09:56:30.53 |
+09:36:16.3 |
HIP 48866 |
22.85 |
| 2026-08-05 00:00 |
09:56:50.14 |
+09:34:43.5 |
HIP 48866 |
18.71 |
| 2026-08-05 12:00 |
09:57:09.75 |
+09:33:10.5 |
HIP 48866 |
15.15 |
| 2026-08-06 00:00 |
09:57:29.37 |
+09:31:37.2 |
HIP 48866 |
12.67 |
| 2026-08-06 12:00 |
09:57:49.00 |
+09:30:03.7 |
HIP 48866 |
11.97 |
| 2026-08-07 00:00 |
09:58:08.63 |
+09:28:29.9 |
HIP 48866 |
13.33 |
| 2026-08-07 12:00 |
09:58:28.27 |
+09:26:55.9 |
HIP 48866 |
16.25 |
| 2026-08-08 00:00 |
09:58:47.92 |
+09:25:21.7 |
HIP 48866 |
20.06 |
| 2026-08-08 12:00 |
09:59:07.58 |
+09:23:47.3 |
HIP 48866 |
24.35 |
| 2026-08-09 00:00 |
09:59:27.24 |
+09:22:12.6 |
HIP 48866 |
28.90 |
| 2026-08-09 12:00 |
09:59:46.91 |
+09:20:37.8 |
HIP 49080 |
29.87 |
| 2026-08-10 00:00 |
10:00:06.58 |
+09:19:02.7 |
HIP 49080 |
25.81 |
| 2026-08-10 12:00 |
10:00:26.25 |
+09:17:27.4 |
HIP 49080 |
22.19 |
| 2026-08-11 00:00 |
10:00:45.93 |
+09:15:51.9 |
HIP 49080 |
19.26 |
| 2026-08-11 12:00 |
10:01:05.61 |
+09:14:16.1 |
HIP 49080 |
17.36 |
| 2026-08-12 00:00 |
10:01:25.29 |
+09:12:40.2 |
HIP 49080 |
16.85 |
| 2026-08-12 12:00 |
10:01:44.98 |
+09:11:04.1 |
HIP 49080 |
17.86 |
| 2026-08-13 00:00 |
10:02:04.66 |
+09:09:27.8 |
HIP 49080 |
20.15 |
| 2026-08-13 12:00 |
10:02:24.35 |
+09:07:51.3 |
HIP 49080 |
23.36 |
| 2026-08-14 00:00 |
10:02:44.03 |
+09:06:14.7 |
HIP 49185 |
26.66 |
| 2026-08-14 12:00 |
10:03:03.71 |
+09:04:37.8 |
HIP 49185 |
26.65 |
| 2026-08-15 00:00 |
10:03:23.39 |
+09:03:00.8 |
HIP 49185 |
27.61 |
| 2026-08-15 12:00 |
10:03:43.07 |
+09:01:23.6 |
HIP 49185 |
29.44 |
| 2026-08-16 00:00 |
10:04:02.74 |
+08:59:46.2 |
HIP 49185 |
31.99 |
| 2026-08-16 12:00 |
10:04:22.41 |
+08:58:08.7 |
HIP 49492 |
29.03 |
| 2026-08-17 00:00 |
10:04:42.08 |
+08:56:31.0 |
HIP 49492 |
23.91 |
| 2026-08-17 12:00 |
10:05:01.74 |
+08:54:53.1 |
HIP 49492 |
18.80 |
| 2026-08-18 00:00 |
10:05:21.40 |
+08:53:15.1 |
HIP 49492 |
13.69 |
| 2026-08-18 12:00 |
10:05:41.05 |
+08:51:37.0 |
HIP 49492 |
8.60 |
| 2026-08-19 00:00 |
10:06:00.69 |
+08:49:58.7 |
HIP 49492 |
3.61 |