P/2024 R2 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2024 R2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-10-01T23:06:13.608000Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:03Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
15.600 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-09-03T12:43:40.080000Z |
| Discovery magnitude (MPC) |
20.72 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) |
2024-09-12.0000000 |
| e |
0.26821638 |
| q (au) |
2.303780 |
| a (au) |
3.148171 |
| i (deg) |
15.120781 |
| Ω (om, deg) |
193.061486 |
| ω (w, deg) |
203.974490 |
| M (ma, deg) |
356.477630 |
等級
散乱 + 全体線形
$$
M_a = (16.480 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.480 |
| n |
2.000 |
| gf |
0.968 |
| gb |
-0.728 |
| k |
1.000 |
| δ90 |
9.955 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
10:35:31.86 |
-05:17:22.6 |
HIP 51837 |
4.63 |
| 2026-02-03 12:00 |
10:35:13.65 |
-05:15:16.5 |
HIP 51837 |
7.07 |
| 2026-02-04 00:00 |
10:34:55.26 |
-05:13:07.8 |
HIP 51837 |
11.39 |
| 2026-02-04 12:00 |
10:34:36.69 |
-05:10:56.6 |
HIP 51837 |
16.21 |
| 2026-02-05 00:00 |
10:34:17.94 |
-05:08:42.8 |
HIP 51659 |
20.44 |
| 2026-02-05 12:00 |
10:33:59.02 |
-05:06:26.5 |
HIP 51659 |
18.86 |
| 2026-02-06 00:00 |
10:33:39.94 |
-05:04:07.7 |
HIP 51659 |
18.69 |
| 2026-02-06 12:00 |
10:33:20.68 |
-05:01:46.5 |
HIP 51659 |
20.01 |
| 2026-02-07 00:00 |
10:33:01.27 |
-04:59:22.7 |
HIP 51659 |
22.59 |
| 2026-02-07 12:00 |
10:32:41.71 |
-04:56:56.5 |
HIP 51659 |
26.10 |
| 2026-02-08 00:00 |
10:32:21.99 |
-04:54:27.9 |
HIP 51659 |
30.25 |
| 2026-02-08 12:00 |
10:32:02.13 |
-04:51:56.9 |
HIP 51659 |
34.82 |
| 2026-02-09 00:00 |
10:31:42.13 |
-04:49:23.5 |
HIP 51659 |
39.70 |
| 2026-02-09 12:00 |
10:31:21.99 |
-04:46:47.7 |
HIP 51329 |
34.63 |
| 2026-02-10 00:00 |
10:31:01.71 |
-04:44:09.6 |
HIP 51329 |
29.29 |
| 2026-02-10 12:00 |
10:30:41.32 |
-04:41:29.1 |
HIP 51329 |
24.10 |
| 2026-02-11 00:00 |
10:30:20.80 |
-04:38:46.4 |
HIP 51329 |
19.18 |
| 2026-02-11 12:00 |
10:30:00.16 |
-04:36:01.4 |
HIP 51329 |
14.90 |
| 2026-02-12 00:00 |
10:29:39.41 |
-04:33:14.1 |
HIP 51329 |
12.01 |
| 2026-02-12 12:00 |
10:29:18.56 |
-04:30:24.7 |
HIP 51329 |
11.66 |
| 2026-02-13 00:00 |
10:28:57.60 |
-04:27:33.0 |
HIP 51329 |
14.10 |
| 2026-02-13 12:00 |
10:28:36.55 |
-04:24:39.2 |
HIP 51329 |
18.28 |
| 2026-02-14 00:00 |
10:28:15.40 |
-04:21:43.3 |
HIP 51135 |
22.12 |
| 2026-02-14 12:00 |
10:27:54.17 |
-04:18:45.2 |
HIP 51135 |
17.38 |
| 2026-02-15 00:00 |
10:27:32.86 |
-04:15:45.1 |
HIP 51135 |
13.72 |
| 2026-02-15 12:00 |
10:27:11.48 |
-04:12:43.0 |
HIP 51135 |
12.23 |
| 2026-02-16 00:00 |
10:26:50.03 |
-04:09:38.8 |
HIP 51135 |
13.68 |
| 2026-02-16 12:00 |
10:26:28.51 |
-04:06:32.7 |
HIP 51135 |
17.37 |
| 2026-02-17 00:00 |
10:26:06.94 |
-04:03:24.7 |
HIP 51135 |
22.24 |
| 2026-02-17 12:00 |
10:25:45.31 |
-04:00:14.7 |
HIP 51135 |
27.70 |
| 2026-02-18 00:00 |
10:25:23.64 |
-03:57:02.9 |
HIP 50985 |
26.83 |
| 2026-02-18 12:00 |
10:25:01.93 |
-03:53:49.3 |
HIP 50985 |
22.74 |
| 2026-02-19 00:00 |
10:24:40.18 |
-03:50:33.9 |
HIP 50985 |
19.82 |
| 2026-02-19 12:00 |
10:24:18.40 |
-03:47:16.7 |
HIP 50893 |
14.35 |
| 2026-02-20 00:00 |
10:23:56.60 |
-03:43:57.9 |
HIP 50893 |
8.05 |
| 2026-02-20 12:00 |
10:23:34.78 |
-03:40:37.4 |
HIP 50893 |
2.12 |
| 2026-02-21 00:00 |
10:23:12.94 |
-03:37:15.2 |
HIP 50893 |
5.09 |
| 2026-02-21 12:00 |
10:22:51.11 |
-03:33:51.5 |
HIP 50893 |
11.39 |
| 2026-02-22 00:00 |
10:22:29.27 |
-03:30:26.2 |
HIP 50893 |
17.79 |
| 2026-02-22 12:00 |
10:22:07.43 |
-03:26:59.4 |
HIP 50893 |
24.22 |
| 2026-02-23 00:00 |
10:21:45.61 |
-03:23:31.2 |
HIP 50736 |
28.16 |
| 2026-02-23 12:00 |
10:21:23.80 |
-03:20:01.5 |
HIP 50736 |
31.67 |
| 2026-02-24 00:00 |
10:21:02.02 |
-03:16:30.5 |
HIP 50736 |
36.04 |