メタデータ
| 項目 |
値 |
| Designation |
P/2021 R3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-05-27T03:58:54.658560Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:08Z |
| Obs used |
63 |
| NEO |
- |
| M1 |
18.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-09-05T07:39:54.432000Z |
| Discovery magnitude (MPC) |
21.40 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-08-28.0000000 |
| e |
0.33193059 |
| q (au) |
2.525552 |
| a (au) |
3.780374 |
| i (deg) |
19.933099 |
| Ω (om, deg) |
304.252763 |
| ω (w, deg) |
3.018607 |
| M (ma, deg) |
12.448284 |
等級
散乱 + 全体線形
$$
M_a = (17.611 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.611 |
| n |
2.000 |
| gf |
0.906 |
| gb |
-0.732 |
| k |
0.996 |
| δ90 |
5.566 |
| 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 |
09:50:58.84 |
-00:26:19.7 |
HIP 48252 |
17.18 |
| 2026-06-01 12:00 |
09:51:12.07 |
-00:26:56.5 |
HIP 48252 |
19.97 |
| 2026-06-02 00:00 |
09:51:25.45 |
-00:27:34.4 |
HIP 48252 |
22.96 |
| 2026-06-02 12:00 |
09:51:38.98 |
-00:28:13.4 |
HIP 48252 |
26.10 |
| 2026-06-03 00:00 |
09:51:52.67 |
-00:28:53.5 |
HIP 48252 |
29.34 |
| 2026-06-03 12:00 |
09:52:06.51 |
-00:29:34.7 |
HIP 48252 |
32.68 |
| 2026-06-04 00:00 |
09:52:20.51 |
-00:30:16.9 |
HIP 48590 |
33.97 |
| 2026-06-04 12:00 |
09:52:34.65 |
-00:31:00.3 |
HIP 48590 |
30.64 |
| 2026-06-05 00:00 |
09:52:48.94 |
-00:31:44.7 |
HIP 48590 |
27.36 |
| 2026-06-05 12:00 |
09:53:03.38 |
-00:32:30.2 |
HIP 48590 |
24.15 |
| 2026-06-06 00:00 |
09:53:17.96 |
-00:33:16.8 |
HIP 48590 |
21.08 |
| 2026-06-06 12:00 |
09:53:32.70 |
-00:34:04.4 |
HIP 48590 |
18.23 |
| 2026-06-07 00:00 |
09:53:47.58 |
-00:34:53.2 |
HIP 48590 |
15.75 |
| 2026-06-07 12:00 |
09:54:02.60 |
-00:35:43.0 |
HIP 48590 |
13.89 |
| 2026-06-08 00:00 |
09:54:17.77 |
-00:36:33.8 |
HIP 48590 |
12.94 |
| 2026-06-08 12:00 |
09:54:33.08 |
-00:37:25.8 |
HIP 48590 |
13.13 |
| 2026-06-09 00:00 |
09:54:48.53 |
-00:38:18.8 |
HIP 48590 |
14.46 |
| 2026-06-09 12:00 |
09:55:04.12 |
-00:39:12.9 |
HIP 48590 |
16.68 |
| 2026-06-10 00:00 |
09:55:19.86 |
-00:40:08.1 |
HIP 48590 |
19.51 |
| 2026-06-10 12:00 |
09:55:35.73 |
-00:41:04.4 |
HIP 48756 |
20.74 |
| 2026-06-11 00:00 |
09:55:51.74 |
-00:42:01.7 |
HIP 48756 |
18.60 |
| 2026-06-11 12:00 |
09:56:07.89 |
-00:43:00.1 |
HIP 48756 |
17.19 |
| 2026-06-12 00:00 |
09:56:24.18 |
-00:43:59.6 |
HIP 48756 |
16.73 |
| 2026-06-12 12:00 |
09:56:40.60 |
-00:45:00.1 |
HIP 48756 |
17.32 |
| 2026-06-13 00:00 |
09:56:57.15 |
-00:46:01.7 |
HIP 48756 |
18.89 |
| 2026-06-13 12:00 |
09:57:13.84 |
-00:47:04.4 |
HIP 48756 |
21.24 |
| 2026-06-14 00:00 |
09:57:30.67 |
-00:48:08.2 |
HIP 48756 |
24.17 |
| 2026-06-14 12:00 |
09:57:47.62 |
-00:49:13.0 |
HIP 48756 |
27.51 |
| 2026-06-15 00:00 |
09:58:04.71 |
-00:50:18.9 |
HIP 48756 |
31.14 |
| 2026-06-15 12:00 |
09:58:21.93 |
-00:51:25.8 |
HIP 49037 |
31.31 |
| 2026-06-16 00:00 |
09:58:39.27 |
-00:52:33.8 |
HIP 49037 |
26.87 |
| 2026-06-16 12:00 |
09:58:56.74 |
-00:53:42.9 |
HIP 49037 |
22.43 |
| 2026-06-17 00:00 |
09:59:14.34 |
-00:54:53.0 |
HIP 49037 |
17.97 |
| 2026-06-17 12:00 |
09:59:32.07 |
-00:56:04.2 |
HIP 49037 |
13.55 |
| 2026-06-18 00:00 |
09:59:49.92 |
-00:57:16.4 |
HIP 49037 |
9.26 |
| 2026-06-18 12:00 |
10:00:07.90 |
-00:58:29.7 |
HIP 49037 |
5.50 |
| 2026-06-19 00:00 |
10:00:25.99 |
-00:59:44.1 |
HIP 49037 |
4.25 |
| 2026-06-19 12:00 |
10:00:44.21 |
-01:00:59.4 |
HIP 49037 |
7.09 |
| 2026-06-20 00:00 |
10:01:02.55 |
-01:02:15.8 |
HIP 49125 |
8.30 |
| 2026-06-20 12:00 |
10:01:21.01 |
-01:03:33.3 |
HIP 49125 |
4.37 |
| 2026-06-21 00:00 |
10:01:39.58 |
-01:04:51.8 |
HIP 49125 |
3.92 |
| 2026-06-21 12:00 |
10:01:58.28 |
-01:06:11.3 |
HIP 49125 |
7.66 |
| 2026-06-22 00:00 |
10:02:17.09 |
-01:07:31.8 |
HIP 49221 |
8.75 |