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) |
| 2026-03-26 00:00 |
09:08:38.35 |
+11:43:23.1 |
HIP 44843 |
14.91 |
| 2026-03-26 12:00 |
09:08:33.23 |
+11:44:19.0 |
HIP 44843 |
13.56 |
| 2026-03-27 00:00 |
09:08:28.27 |
+11:45:14.3 |
HIP 44843 |
12.28 |
| 2026-03-27 12:00 |
09:08:23.46 |
+11:46:08.9 |
HIP 44843 |
11.08 |
| 2026-03-28 00:00 |
09:08:18.81 |
+11:47:02.9 |
HIP 44843 |
9.97 |
| 2026-03-28 12:00 |
09:08:14.31 |
+11:47:56.2 |
HIP 44843 |
8.98 |
| 2026-03-29 00:00 |
09:08:09.97 |
+11:48:48.8 |
HIP 44843 |
8.12 |
| 2026-03-29 12:00 |
09:08:05.78 |
+11:49:40.8 |
HIP 44843 |
7.41 |
| 2026-03-30 00:00 |
09:08:01.76 |
+11:50:32.1 |
HIP 44843 |
6.90 |
| 2026-03-30 12:00 |
09:07:57.89 |
+11:51:22.8 |
HIP 44843 |
6.60 |
| 2026-03-31 00:00 |
09:07:54.17 |
+11:52:12.7 |
HIP 44843 |
6.51 |
| 2026-03-31 12:00 |
09:07:50.61 |
+11:53:02.0 |
HIP 44843 |
6.63 |
| 2026-04-01 00:00 |
09:07:47.21 |
+11:53:50.6 |
HIP 44843 |
6.93 |
| 2026-04-01 12:00 |
09:07:43.97 |
+11:54:38.5 |
HIP 44843 |
7.36 |
| 2026-04-02 00:00 |
09:07:40.89 |
+11:55:25.8 |
HIP 44843 |
7.90 |
| 2026-04-02 12:00 |
09:07:37.96 |
+11:56:12.3 |
HIP 44843 |
8.51 |
| 2026-04-03 00:00 |
09:07:35.19 |
+11:56:58.2 |
HIP 44843 |
9.15 |
| 2026-04-03 12:00 |
09:07:32.58 |
+11:57:43.3 |
HIP 44843 |
9.83 |
| 2026-04-04 00:00 |
09:07:30.12 |
+11:58:27.8 |
HIP 44843 |
10.51 |
| 2026-04-04 12:00 |
09:07:27.83 |
+11:59:11.6 |
HIP 44843 |
11.19 |
| 2026-04-05 00:00 |
09:07:25.69 |
+11:59:54.7 |
HIP 44843 |
11.86 |
| 2026-04-05 12:00 |
09:07:23.71 |
+12:00:37.0 |
HIP 44843 |
12.52 |
| 2026-04-06 00:00 |
09:07:21.89 |
+12:01:18.7 |
HIP 44843 |
13.17 |
| 2026-04-06 12:00 |
09:07:20.22 |
+12:01:59.7 |
HIP 44843 |
13.79 |
| 2026-04-07 00:00 |
09:07:18.72 |
+12:02:40.0 |
HIP 44843 |
14.38 |
| 2026-04-07 12:00 |
09:07:17.37 |
+12:03:19.5 |
HIP 44843 |
14.96 |
| 2026-04-08 00:00 |
09:07:16.18 |
+12:03:58.4 |
HIP 44843 |
15.51 |
| 2026-04-08 12:00 |
09:07:15.15 |
+12:04:36.5 |
HIP 44843 |
16.03 |
| 2026-04-09 00:00 |
09:07:14.28 |
+12:05:13.9 |
HIP 44843 |
16.52 |
| 2026-04-09 12:00 |
09:07:13.56 |
+12:05:50.7 |
HIP 44843 |
16.98 |
| 2026-04-10 00:00 |
09:07:13.01 |
+12:06:26.7 |
HIP 44843 |
17.42 |
| 2026-04-10 12:00 |
09:07:12.61 |
+12:07:01.9 |
HIP 44843 |
17.83 |
| 2026-04-11 00:00 |
09:07:12.37 |
+12:07:36.5 |
HIP 44843 |
18.21 |
| 2026-04-11 12:00 |
09:07:12.28 |
+12:08:10.3 |
HIP 44843 |
18.56 |
| 2026-04-12 00:00 |
09:07:12.36 |
+12:08:43.4 |
HIP 44843 |
18.89 |
| 2026-04-12 12:00 |
09:07:12.59 |
+12:09:15.8 |
HIP 44843 |
19.19 |
| 2026-04-13 00:00 |
09:07:12.98 |
+12:09:47.5 |
HIP 44843 |
19.46 |
| 2026-04-13 12:00 |
09:07:13.53 |
+12:10:18.4 |
HIP 44843 |
19.71 |
| 2026-04-14 00:00 |
09:07:14.23 |
+12:10:48.6 |
HIP 44843 |
19.93 |
| 2026-04-14 12:00 |
09:07:15.10 |
+12:11:18.1 |
HIP 44843 |
20.13 |
| 2026-04-15 00:00 |
09:07:16.12 |
+12:11:46.8 |
HIP 44843 |
20.30 |
| 2026-04-15 12:00 |
09:07:17.29 |
+12:12:14.9 |
HIP 44843 |
20.45 |
| 2026-04-16 00:00 |
09:07:18.62 |
+12:12:42.1 |
HIP 44843 |
20.59 |