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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
12:21:00.09 |
+07:15:01.9 |
HIP 60322 |
25.56 |
| 2026-06-03 00:00 |
12:20:58.16 |
+07:15:12.6 |
HIP 60322 |
25.74 |
| 2026-06-03 12:00 |
12:20:56.34 |
+07:15:22.4 |
HIP 60322 |
25.93 |
| 2026-06-04 00:00 |
12:20:54.62 |
+07:15:31.6 |
HIP 60322 |
26.12 |
| 2026-06-04 12:00 |
12:20:53.01 |
+07:15:39.9 |
HIP 60322 |
26.30 |
| 2026-06-05 00:00 |
12:20:51.50 |
+07:15:47.5 |
HIP 60322 |
26.48 |
| 2026-06-05 12:00 |
12:20:50.09 |
+07:15:54.3 |
HIP 60095 |
26.64 |
| 2026-06-06 00:00 |
12:20:48.79 |
+07:16:00.3 |
HIP 60095 |
26.45 |
| 2026-06-06 12:00 |
12:20:47.59 |
+07:16:05.6 |
HIP 60095 |
26.27 |
| 2026-06-07 00:00 |
12:20:46.50 |
+07:16:10.1 |
HIP 60095 |
26.11 |
| 2026-06-07 12:00 |
12:20:45.51 |
+07:16:13.9 |
HIP 60095 |
25.96 |
| 2026-06-08 00:00 |
12:20:44.62 |
+07:16:16.9 |
HIP 60095 |
25.83 |
| 2026-06-08 12:00 |
12:20:43.84 |
+07:16:19.2 |
HIP 60095 |
25.70 |
| 2026-06-09 00:00 |
12:20:43.17 |
+07:16:20.7 |
HIP 60095 |
25.59 |
| 2026-06-09 12:00 |
12:20:42.60 |
+07:16:21.5 |
HIP 60095 |
25.49 |
| 2026-06-10 00:00 |
12:20:42.13 |
+07:16:21.5 |
HIP 60095 |
25.41 |
| 2026-06-10 12:00 |
12:20:41.76 |
+07:16:20.8 |
HIP 60095 |
25.33 |
| 2026-06-11 00:00 |
12:20:41.51 |
+07:16:19.4 |
HIP 60095 |
25.27 |
| 2026-06-11 12:00 |
12:20:41.35 |
+07:16:17.2 |
HIP 60095 |
25.22 |
| 2026-06-12 00:00 |
12:20:41.30 |
+07:16:14.3 |
HIP 60095 |
25.17 |
| 2026-06-12 12:00 |
12:20:41.35 |
+07:16:10.7 |
HIP 60095 |
25.14 |
| 2026-06-13 00:00 |
12:20:41.51 |
+07:16:06.3 |
HIP 60095 |
25.13 |
| 2026-06-13 12:00 |
12:20:41.77 |
+07:16:01.2 |
HIP 60095 |
25.12 |
| 2026-06-14 00:00 |
12:20:42.14 |
+07:15:55.4 |
HIP 60095 |
25.12 |
| 2026-06-14 12:00 |
12:20:42.61 |
+07:15:48.9 |
HIP 60095 |
25.14 |
| 2026-06-15 00:00 |
12:20:43.18 |
+07:15:41.6 |
HIP 60095 |
25.17 |
| 2026-06-15 12:00 |
12:20:43.86 |
+07:15:33.7 |
HIP 60095 |
25.22 |
| 2026-06-16 00:00 |
12:20:44.64 |
+07:15:25.0 |
HIP 60095 |
25.28 |
| 2026-06-16 12:00 |
12:20:45.53 |
+07:15:15.7 |
HIP 60095 |
25.35 |
| 2026-06-17 00:00 |
12:20:46.52 |
+07:15:05.6 |
HIP 60095 |
25.44 |
| 2026-06-17 12:00 |
12:20:47.61 |
+07:14:54.9 |
HIP 60095 |
25.55 |
| 2026-06-18 00:00 |
12:20:48.80 |
+07:14:43.4 |
HIP 60095 |
25.67 |
| 2026-06-18 12:00 |
12:20:50.10 |
+07:14:31.3 |
HIP 60095 |
25.81 |
| 2026-06-19 00:00 |
12:20:51.49 |
+07:14:18.5 |
HIP 60095 |
25.97 |
| 2026-06-19 12:00 |
12:20:52.99 |
+07:14:05.0 |
HIP 60095 |
26.15 |
| 2026-06-20 00:00 |
12:20:54.60 |
+07:13:50.9 |
HIP 60095 |
26.35 |
| 2026-06-20 12:00 |
12:20:56.30 |
+07:13:36.0 |
HIP 60095 |
26.58 |
| 2026-06-21 00:00 |
12:20:58.10 |
+07:13:20.5 |
HIP 60095 |
26.82 |
| 2026-06-21 12:00 |
12:21:00.01 |
+07:13:04.4 |
HIP 60322 |
27.07 |
| 2026-06-22 00:00 |
12:21:02.02 |
+07:12:47.6 |
HIP 60322 |
26.98 |