メタデータ
| 項目 |
値 |
| Designation |
P/2021 R6 (Groeller) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-10-31T20:32:49.485120Z |
| Orbit solution date (soln_date, UTC) |
2021-11-20T19:13:09Z |
| Obs used |
105 |
| NEO |
- |
| M1 |
14.900 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2021-09-12T11:00:52.588800Z |
| Discovery magnitude (MPC) |
20.27 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-09-29.0000000 |
| e |
0.59323774 |
| q (au) |
2.552105 |
| a (au) |
6.274194 |
| i (deg) |
34.926106 |
| Ω (om, deg) |
176.113969 |
| ω (w, deg) |
220.719673 |
| M (ma, deg) |
357.939448 |
等級
散乱 + 全体線形
$$
M_a = (15.810 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.810 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.826 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
12:23:59.59 |
+06:54:44.1 |
HIP 60547 |
19.98 |
| 2026-05-12 12:00 |
12:23:53.35 |
+06:55:29.7 |
HIP 60547 |
21.47 |
| 2026-05-13 00:00 |
12:23:47.20 |
+06:56:14.5 |
HIP 60547 |
22.97 |
| 2026-05-13 12:00 |
12:23:41.14 |
+06:56:58.4 |
HIP 60547 |
24.47 |
| 2026-05-14 00:00 |
12:23:35.18 |
+06:57:41.5 |
HIP 60547 |
25.96 |
| 2026-05-14 12:00 |
12:23:29.31 |
+06:58:23.8 |
HIP 60547 |
27.45 |
| 2026-05-15 00:00 |
12:23:23.54 |
+06:59:05.3 |
HIP 60547 |
28.92 |
| 2026-05-15 12:00 |
12:23:17.86 |
+06:59:45.9 |
HIP 60547 |
30.38 |
| 2026-05-16 00:00 |
12:23:12.28 |
+07:00:25.7 |
HIP 60547 |
31.82 |
| 2026-05-16 12:00 |
12:23:06.79 |
+07:01:04.6 |
HIP 60547 |
33.25 |
| 2026-05-17 00:00 |
12:23:01.40 |
+07:01:42.8 |
HIP 60547 |
34.65 |
| 2026-05-17 12:00 |
12:22:56.11 |
+07:02:20.1 |
HIP 60322 |
33.98 |
| 2026-05-18 00:00 |
12:22:50.92 |
+07:02:56.6 |
HIP 60322 |
32.97 |
| 2026-05-18 12:00 |
12:22:45.82 |
+07:03:32.2 |
HIP 60322 |
32.02 |
| 2026-05-19 00:00 |
12:22:40.83 |
+07:04:07.0 |
HIP 60322 |
31.12 |
| 2026-05-19 12:00 |
12:22:35.93 |
+07:04:41.0 |
HIP 60322 |
30.28 |
| 2026-05-20 00:00 |
12:22:31.13 |
+07:05:14.2 |
HIP 60322 |
29.49 |
| 2026-05-20 12:00 |
12:22:26.43 |
+07:05:46.5 |
HIP 60322 |
28.76 |
| 2026-05-21 00:00 |
12:22:21.84 |
+07:06:18.0 |
HIP 60322 |
28.08 |
| 2026-05-21 12:00 |
12:22:17.34 |
+07:06:48.7 |
HIP 60322 |
27.46 |
| 2026-05-22 00:00 |
12:22:12.94 |
+07:07:18.5 |
HIP 60322 |
26.90 |
| 2026-05-22 12:00 |
12:22:08.65 |
+07:07:47.5 |
HIP 60322 |
26.39 |
| 2026-05-23 00:00 |
12:22:04.45 |
+07:08:15.7 |
HIP 60322 |
25.94 |
| 2026-05-23 12:00 |
12:22:00.36 |
+07:08:43.1 |
HIP 60322 |
25.54 |
| 2026-05-24 00:00 |
12:21:56.37 |
+07:09:09.7 |
HIP 60322 |
25.19 |
| 2026-05-24 12:00 |
12:21:52.48 |
+07:09:35.5 |
HIP 60322 |
24.90 |
| 2026-05-25 00:00 |
12:21:48.70 |
+07:10:00.4 |
HIP 60322 |
24.66 |
| 2026-05-25 12:00 |
12:21:45.01 |
+07:10:24.5 |
HIP 60322 |
24.47 |
| 2026-05-26 00:00 |
12:21:41.43 |
+07:10:47.9 |
HIP 60322 |
24.32 |
| 2026-05-26 12:00 |
12:21:37.95 |
+07:11:10.4 |
HIP 60322 |
24.21 |
| 2026-05-27 00:00 |
12:21:34.58 |
+07:11:32.1 |
HIP 60322 |
24.15 |
| 2026-05-27 12:00 |
12:21:31.30 |
+07:11:53.0 |
HIP 60322 |
24.12 |
| 2026-05-28 00:00 |
12:21:28.13 |
+07:12:13.1 |
HIP 60322 |
24.12 |
| 2026-05-28 12:00 |
12:21:25.07 |
+07:12:32.4 |
HIP 60322 |
24.16 |
| 2026-05-29 00:00 |
12:21:22.10 |
+07:12:50.9 |
HIP 60322 |
24.22 |
| 2026-05-29 12:00 |
12:21:19.24 |
+07:13:08.6 |
HIP 60322 |
24.31 |
| 2026-05-30 00:00 |
12:21:16.49 |
+07:13:25.5 |
HIP 60322 |
24.42 |
| 2026-05-30 12:00 |
12:21:13.83 |
+07:13:41.6 |
HIP 60322 |
24.55 |
| 2026-05-31 00:00 |
12:21:11.28 |
+07:13:57.0 |
HIP 60322 |
24.69 |
| 2026-05-31 12:00 |
12:21:08.84 |
+07:14:11.5 |
HIP 60322 |
24.85 |
| 2026-06-01 00:00 |
12:21:06.49 |
+07:14:25.3 |
HIP 60322 |
25.01 |
| 2026-06-01 12:00 |
12:21:04.25 |
+07:14:38.3 |
HIP 60322 |
25.19 |
| 2026-06-02 00:00 |
12:21:02.12 |
+07:14:50.5 |
HIP 60322 |
25.37 |