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 |
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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:06:11.34 |
-02:44:09.6 |
HIP 59005 |
16.89 |
| 2026-09-20 12:00 |
12:06:45.16 |
-02:47:01.2 |
HIP 59005 |
22.99 |
| 2026-09-21 00:00 |
12:07:18.98 |
-02:49:52.9 |
HIP 59150 |
19.46 |
| 2026-09-21 12:00 |
12:07:52.79 |
-02:52:44.6 |
HIP 59150 |
15.11 |
| 2026-09-22 00:00 |
12:08:26.61 |
-02:55:36.4 |
HIP 59150 |
15.40 |
| 2026-09-22 12:00 |
12:09:00.42 |
-02:58:28.2 |
HIP 59150 |
20.12 |
| 2026-09-23 00:00 |
12:09:34.22 |
-03:01:20.0 |
HIP 59150 |
27.04 |
| 2026-09-23 12:00 |
12:10:08.03 |
-03:04:11.8 |
HIP 59423 |
28.93 |
| 2026-09-24 00:00 |
12:10:41.83 |
-03:07:03.7 |
HIP 59532 |
26.87 |
| 2026-09-24 12:00 |
12:11:15.62 |
-03:09:55.6 |
HIP 59532 |
18.98 |
| 2026-09-25 00:00 |
12:11:49.41 |
-03:12:47.5 |
HIP 59532 |
12.54 |
| 2026-09-25 12:00 |
12:12:23.20 |
-03:15:39.3 |
HIP 59532 |
10.63 |
| 2026-09-26 00:00 |
12:12:56.98 |
-03:18:31.2 |
HIP 59532 |
15.08 |
| 2026-09-26 12:00 |
12:13:30.76 |
-03:21:23.1 |
HIP 59532 |
22.37 |
| 2026-09-27 00:00 |
12:14:04.53 |
-03:24:15.0 |
HIP 59532 |
30.52 |
| 2026-09-27 12:00 |
12:14:38.29 |
-03:27:06.8 |
HIP 59843 |
27.78 |
| 2026-09-28 00:00 |
12:15:12.05 |
-03:29:58.6 |
HIP 59843 |
22.62 |
| 2026-09-28 12:00 |
12:15:45.80 |
-03:32:50.4 |
HIP 59843 |
20.24 |
| 2026-09-29 00:00 |
12:16:19.55 |
-03:35:42.2 |
HIP 59843 |
21.59 |
| 2026-09-29 12:00 |
12:16:53.29 |
-03:38:33.9 |
HIP 59843 |
26.09 |
| 2026-09-30 00:00 |
12:17:27.02 |
-03:41:25.6 |
HIP 59984 |
18.79 |
| 2026-09-30 12:00 |
12:18:00.74 |
-03:44:17.3 |
HIP 59984 |
12.83 |
| 2026-10-01 00:00 |
12:18:34.46 |
-03:47:08.9 |
HIP 59984 |
11.58 |
| 2026-10-01 12:00 |
12:19:08.16 |
-03:50:00.4 |
HIP 59984 |
16.17 |
| 2026-10-02 00:00 |
12:19:41.86 |
-03:52:51.9 |
HIP 60194 |
15.88 |
| 2026-10-02 12:00 |
12:20:15.55 |
-03:55:43.3 |
HIP 60194 |
7.14 |
| 2026-10-03 00:00 |
12:20:49.23 |
-03:58:34.7 |
HIP 60194 |
2.71 |
| 2026-10-03 12:00 |
12:21:22.90 |
-04:01:25.9 |
HIP 60194 |
11.00 |
| 2026-10-04 00:00 |
12:21:56.56 |
-04:04:17.1 |
HIP 60298 |
18.94 |
| 2026-10-04 12:00 |
12:22:30.21 |
-04:07:08.2 |
HIP 60298 |
18.77 |
| 2026-10-05 00:00 |
12:23:03.85 |
-04:09:59.2 |
HIP 60298 |
22.42 |
| 2026-10-05 12:00 |
12:23:37.47 |
-04:12:50.2 |
HIP 60574 |
20.35 |
| 2026-10-06 00:00 |
12:24:11.09 |
-04:15:41.0 |
HIP 60574 |
12.15 |
| 2026-10-06 12:00 |
12:24:44.69 |
-04:18:31.7 |
HIP 60574 |
6.17 |
| 2026-10-07 00:00 |
12:25:18.27 |
-04:21:22.2 |
HIP 60574 |
9.21 |
| 2026-10-07 12:00 |
12:25:51.85 |
-04:24:12.7 |
HIP 60680 |
6.19 |
| 2026-10-08 00:00 |
12:26:25.41 |
-04:27:03.0 |
HIP 60680 |
4.63 |
| 2026-10-08 12:00 |
12:26:58.95 |
-04:29:53.2 |
HIP 60680 |
12.67 |
| 2026-10-09 00:00 |
12:27:32.48 |
-04:32:43.2 |
HIP 60813 |
6.35 |
| 2026-10-09 12:00 |
12:28:05.99 |
-04:35:33.1 |
HIP 60813 |
3.84 |
| 2026-10-10 00:00 |
12:28:39.49 |
-04:38:22.8 |
HIP 60813 |
12.02 |
| 2026-10-10 12:00 |
12:29:12.97 |
-04:41:12.4 |
HIP 60813 |
20.72 |
| 2026-10-11 00:00 |
12:29:46.43 |
-04:44:01.8 |
HIP 60813 |
29.48 |