メタデータ
| 項目 |
値 |
| Designation |
C/1971 M1 (Edwards) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1971-12-07T23:04:58.232640Z |
| Orbit solution date (soln_date, UTC) |
2023-03-26T23:42:03Z |
| Obs used |
7 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1971-07-04.0000000 |
| e |
1.00000000 |
| q (au) |
2.881429 |
| a (au) |
- |
| i (deg) |
97.149236 |
| Ω (om, deg) |
267.776204 |
| ω (w, deg) |
44.179761 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
05:40:21.80 |
+01:36:33.2 |
HIP 26648 |
10.79 |
| 2026-06-01 12:00 |
05:40:23.22 |
+01:36:35.3 |
HIP 26648 |
11.09 |
| 2026-06-02 00:00 |
05:40:24.65 |
+01:36:37.5 |
HIP 26648 |
11.39 |
| 2026-06-02 12:00 |
05:40:26.08 |
+01:36:39.5 |
HIP 26648 |
11.69 |
| 2026-06-03 00:00 |
05:40:27.52 |
+01:36:41.5 |
HIP 26648 |
12.00 |
| 2026-06-03 12:00 |
05:40:28.96 |
+01:36:43.4 |
HIP 26648 |
12.31 |
| 2026-06-04 00:00 |
05:40:30.40 |
+01:36:45.3 |
HIP 26648 |
12.62 |
| 2026-06-04 12:00 |
05:40:31.84 |
+01:36:47.1 |
HIP 26648 |
12.93 |
| 2026-06-05 00:00 |
05:40:33.29 |
+01:36:48.8 |
HIP 26648 |
13.25 |
| 2026-06-05 12:00 |
05:40:34.73 |
+01:36:50.4 |
HIP 26648 |
13.56 |
| 2026-06-06 00:00 |
05:40:36.18 |
+01:36:52.0 |
HIP 26648 |
13.88 |
| 2026-06-06 12:00 |
05:40:37.64 |
+01:36:53.5 |
HIP 26648 |
14.21 |
| 2026-06-07 00:00 |
05:40:39.09 |
+01:36:55.0 |
HIP 26648 |
14.53 |
| 2026-06-07 12:00 |
05:40:40.55 |
+01:36:56.4 |
HIP 26648 |
14.86 |
| 2026-06-08 00:00 |
05:40:42.01 |
+01:36:57.7 |
HIP 26648 |
15.18 |
| 2026-06-08 12:00 |
05:40:43.47 |
+01:36:58.9 |
HIP 26648 |
15.51 |
| 2026-06-09 00:00 |
05:40:44.93 |
+01:37:00.1 |
HIP 26648 |
15.84 |
| 2026-06-09 12:00 |
05:40:46.40 |
+01:37:01.2 |
HIP 26648 |
16.18 |
| 2026-06-10 00:00 |
05:40:47.86 |
+01:37:02.3 |
HIP 26648 |
16.51 |
| 2026-06-10 12:00 |
05:40:49.33 |
+01:37:03.2 |
HIP 26822 |
16.30 |
| 2026-06-11 00:00 |
05:40:50.80 |
+01:37:04.1 |
HIP 26822 |
15.99 |
| 2026-06-11 12:00 |
05:40:52.27 |
+01:37:05.0 |
HIP 26822 |
15.69 |
| 2026-06-12 00:00 |
05:40:53.74 |
+01:37:05.7 |
HIP 26822 |
15.39 |
| 2026-06-12 12:00 |
05:40:55.21 |
+01:37:06.4 |
HIP 26822 |
15.10 |
| 2026-06-13 00:00 |
05:40:56.68 |
+01:37:07.1 |
HIP 26822 |
14.81 |
| 2026-06-13 12:00 |
05:40:58.16 |
+01:37:07.6 |
HIP 26822 |
14.52 |
| 2026-06-14 00:00 |
05:40:59.63 |
+01:37:08.1 |
HIP 26822 |
14.23 |
| 2026-06-14 12:00 |
05:41:01.11 |
+01:37:08.5 |
HIP 26822 |
13.96 |
| 2026-06-15 00:00 |
05:41:02.58 |
+01:37:08.9 |
HIP 26822 |
13.68 |
| 2026-06-15 12:00 |
05:41:04.06 |
+01:37:09.1 |
HIP 26822 |
13.41 |
| 2026-06-16 00:00 |
05:41:05.54 |
+01:37:09.3 |
HIP 26822 |
13.15 |
| 2026-06-16 12:00 |
05:41:07.01 |
+01:37:09.5 |
HIP 26822 |
12.89 |
| 2026-06-17 00:00 |
05:41:08.49 |
+01:37:09.5 |
HIP 26822 |
12.64 |
| 2026-06-17 12:00 |
05:41:09.97 |
+01:37:09.5 |
HIP 26822 |
12.40 |
| 2026-06-18 00:00 |
05:41:11.44 |
+01:37:09.5 |
HIP 26822 |
12.16 |
| 2026-06-18 12:00 |
05:41:12.92 |
+01:37:09.3 |
HIP 26822 |
11.94 |
| 2026-06-19 00:00 |
05:41:14.40 |
+01:37:09.1 |
HIP 26822 |
11.72 |
| 2026-06-19 12:00 |
05:41:15.87 |
+01:37:08.8 |
HIP 26822 |
11.50 |
| 2026-06-20 00:00 |
05:41:17.35 |
+01:37:08.5 |
HIP 26822 |
11.30 |
| 2026-06-20 12:00 |
05:41:18.82 |
+01:37:08.0 |
HIP 26822 |
11.11 |
| 2026-06-21 00:00 |
05:41:20.30 |
+01:37:07.5 |
HIP 26822 |
10.93 |
| 2026-06-21 12:00 |
05:41:21.77 |
+01:37:07.0 |
HIP 26822 |
10.75 |
| 2026-06-22 00:00 |
05:41:23.24 |
+01:37:06.3 |
HIP 26822 |
10.59 |