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 · University of Arizona 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) |
| 2026-09-20 00:00 |
12:47:49.21 |
+04:33:24.0 |
HIP 62401 |
25.87 |
| 2026-09-20 12:00 |
12:48:02.51 |
+04:32:17.7 |
HIP 62401 |
26.04 |
| 2026-09-21 00:00 |
12:48:15.82 |
+04:31:11.6 |
HIP 62401 |
26.67 |
| 2026-09-21 12:00 |
12:48:29.16 |
+04:30:05.6 |
HIP 62401 |
27.73 |
| 2026-09-22 00:00 |
12:48:42.50 |
+04:28:59.7 |
HIP 62401 |
29.18 |
| 2026-09-22 12:00 |
12:48:55.87 |
+04:27:54.0 |
HIP 62401 |
30.97 |
| 2026-09-23 00:00 |
12:49:09.25 |
+04:26:48.3 |
HIP 62401 |
33.04 |
| 2026-09-23 12:00 |
12:49:22.64 |
+04:25:42.8 |
HIP 62401 |
35.34 |
| 2026-09-24 00:00 |
12:49:36.05 |
+04:24:37.4 |
HIP 62596 |
35.53 |
| 2026-09-24 12:00 |
12:49:49.48 |
+04:23:32.2 |
HIP 62596 |
34.64 |
| 2026-09-25 00:00 |
12:50:02.92 |
+04:22:27.1 |
HIP 62596 |
34.08 |
| 2026-09-25 12:00 |
12:50:16.37 |
+04:21:22.1 |
HIP 62596 |
33.89 |
| 2026-09-26 00:00 |
12:50:29.83 |
+04:20:17.3 |
HIP 62596 |
34.07 |
| 2026-09-26 12:00 |
12:50:43.31 |
+04:19:12.7 |
HIP 62596 |
34.62 |
| 2026-09-27 00:00 |
12:50:56.79 |
+04:18:08.2 |
HIP 62596 |
35.51 |
| 2026-09-27 12:00 |
12:51:10.29 |
+04:17:03.8 |
HIP 62596 |
36.72 |
| 2026-09-28 00:00 |
12:51:23.80 |
+04:15:59.6 |
HIP 62917 |
34.04 |
| 2026-09-28 12:00 |
12:51:37.32 |
+04:14:55.6 |
HIP 62917 |
30.63 |
| 2026-09-29 00:00 |
12:51:50.85 |
+04:13:51.7 |
HIP 62917 |
27.25 |
| 2026-09-29 12:00 |
12:52:04.39 |
+04:12:48.0 |
HIP 62917 |
23.92 |
| 2026-09-30 00:00 |
12:52:17.94 |
+04:11:44.5 |
HIP 62917 |
20.65 |
| 2026-09-30 12:00 |
12:52:31.49 |
+04:10:41.2 |
HIP 62917 |
17.49 |
| 2026-10-01 00:00 |
12:52:45.06 |
+04:09:38.0 |
HIP 62917 |
14.50 |
| 2026-10-01 12:00 |
12:52:58.63 |
+04:08:35.1 |
HIP 62917 |
11.81 |
| 2026-10-02 00:00 |
12:53:12.21 |
+04:07:32.3 |
HIP 62917 |
9.69 |
| 2026-10-02 12:00 |
12:53:25.80 |
+04:06:29.7 |
HIP 62917 |
8.56 |
| 2026-10-03 00:00 |
12:53:39.39 |
+04:05:27.3 |
HIP 62917 |
8.82 |
| 2026-10-03 12:00 |
12:53:52.99 |
+04:04:25.1 |
HIP 62917 |
10.36 |
| 2026-10-04 00:00 |
12:54:06.59 |
+04:03:23.1 |
HIP 62917 |
12.73 |
| 2026-10-04 12:00 |
12:54:20.20 |
+04:02:21.4 |
HIP 62917 |
15.55 |
| 2026-10-05 00:00 |
12:54:33.81 |
+04:01:19.8 |
HIP 62917 |
18.62 |
| 2026-10-05 12:00 |
12:54:47.42 |
+04:00:18.5 |
HIP 62917 |
21.83 |
| 2026-10-06 00:00 |
12:55:01.04 |
+03:59:17.4 |
HIP 62917 |
25.13 |
| 2026-10-06 12:00 |
12:55:14.66 |
+03:58:16.5 |
HIP 62917 |
28.49 |
| 2026-10-07 00:00 |
12:55:28.28 |
+03:57:15.8 |
HIP 63209 |
27.55 |
| 2026-10-07 12:00 |
12:55:41.91 |
+03:56:15.4 |
HIP 63209 |
25.29 |
| 2026-10-08 00:00 |
12:55:55.53 |
+03:55:15.2 |
HIP 63209 |
23.35 |
| 2026-10-08 12:00 |
12:56:09.15 |
+03:54:15.3 |
HIP 63209 |
21.81 |
| 2026-10-09 00:00 |
12:56:22.78 |
+03:53:15.6 |
HIP 63209 |
20.76 |
| 2026-10-09 12:00 |
12:56:36.40 |
+03:52:16.2 |
HIP 63209 |
20.28 |
| 2026-10-10 00:00 |
12:56:50.02 |
+03:51:17.0 |
HIP 63209 |
20.41 |
| 2026-10-10 12:00 |
12:57:03.64 |
+03:50:18.1 |
HIP 63209 |
21.13 |
| 2026-10-11 00:00 |
12:57:17.25 |
+03:49:19.5 |
HIP 63209 |
22.39 |