C/1981 M1 (Gonzalez)
メタデータ
| 項目 |
値 |
| Designation |
C/1981 M1 (Gonzalez) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1981-03-25T15:42:23.296320Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:29Z |
| Obs used |
20 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1981-08-07.0000000 |
| e |
0.99935134 |
| q (au) |
2.333585 |
| a (au) |
3597.566450 |
| i (deg) |
107.144868 |
| Ω (om, deg) |
143.968785 |
| ω (w, deg) |
181.611922 |
| M (ma, deg) |
0.000614 |
等級
散乱 + 全体線形
$$
M_a = (8.178 + 2.822\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.178 |
| n |
2.822 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| 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) |
| 2026-02-03 00:00 |
09:42:44.29 |
-06:13:55.5 |
HIP 47539 |
20.51 |
| 2026-02-03 12:00 |
09:42:42.63 |
-06:13:48.1 |
HIP 47539 |
20.20 |
| 2026-02-04 00:00 |
09:42:40.97 |
-06:13:40.6 |
HIP 47539 |
19.91 |
| 2026-02-04 12:00 |
09:42:39.30 |
-06:13:33.0 |
HIP 47539 |
19.61 |
| 2026-02-05 00:00 |
09:42:37.64 |
-06:13:25.4 |
HIP 47539 |
19.33 |
| 2026-02-05 12:00 |
09:42:35.97 |
-06:13:17.6 |
HIP 47539 |
19.04 |
| 2026-02-06 00:00 |
09:42:34.30 |
-06:13:09.8 |
HIP 47539 |
18.77 |
| 2026-02-06 12:00 |
09:42:32.63 |
-06:13:01.8 |
HIP 47539 |
18.50 |
| 2026-02-07 00:00 |
09:42:30.96 |
-06:12:53.8 |
HIP 47539 |
18.24 |
| 2026-02-07 12:00 |
09:42:29.29 |
-06:12:45.7 |
HIP 47539 |
17.99 |
| 2026-02-08 00:00 |
09:42:27.61 |
-06:12:37.5 |
HIP 47539 |
17.74 |
| 2026-02-08 12:00 |
09:42:25.94 |
-06:12:29.3 |
HIP 47539 |
17.50 |
| 2026-02-09 00:00 |
09:42:24.26 |
-06:12:20.9 |
HIP 47539 |
17.27 |
| 2026-02-09 12:00 |
09:42:22.58 |
-06:12:12.5 |
HIP 47539 |
17.05 |
| 2026-02-10 00:00 |
09:42:20.90 |
-06:12:03.9 |
HIP 47539 |
16.84 |
| 2026-02-10 12:00 |
09:42:19.23 |
-06:11:55.3 |
HIP 47539 |
16.64 |
| 2026-02-11 00:00 |
09:42:17.55 |
-06:11:46.6 |
HIP 47539 |
16.45 |
| 2026-02-11 12:00 |
09:42:15.87 |
-06:11:37.9 |
HIP 47539 |
16.27 |
| 2026-02-12 00:00 |
09:42:14.18 |
-06:11:29.0 |
HIP 47539 |
16.10 |
| 2026-02-12 12:00 |
09:42:12.50 |
-06:11:20.1 |
HIP 47539 |
15.94 |
| 2026-02-13 00:00 |
09:42:10.82 |
-06:11:11.1 |
HIP 47539 |
15.80 |
| 2026-02-13 12:00 |
09:42:09.14 |
-06:11:02.0 |
HIP 47539 |
15.67 |
| 2026-02-14 00:00 |
09:42:07.46 |
-06:10:52.8 |
HIP 47539 |
15.55 |
| 2026-02-14 12:00 |
09:42:05.78 |
-06:10:43.6 |
HIP 47539 |
15.44 |
| 2026-02-15 00:00 |
09:42:04.10 |
-06:10:34.2 |
HIP 47539 |
15.34 |
| 2026-02-15 12:00 |
09:42:02.43 |
-06:10:24.8 |
HIP 47539 |
15.26 |
| 2026-02-16 00:00 |
09:42:00.75 |
-06:10:15.4 |
HIP 47539 |
15.20 |
| 2026-02-16 12:00 |
09:41:59.07 |
-06:10:05.8 |
HIP 47539 |
15.14 |
| 2026-02-17 00:00 |
09:41:57.40 |
-06:09:56.2 |
HIP 47539 |
15.10 |
| 2026-02-17 12:00 |
09:41:55.72 |
-06:09:46.5 |
HIP 47539 |
15.08 |
| 2026-02-18 00:00 |
09:41:54.05 |
-06:09:36.7 |
HIP 47539 |
15.07 |
| 2026-02-18 12:00 |
09:41:52.38 |
-06:09:26.9 |
HIP 47539 |
15.08 |
| 2026-02-19 00:00 |
09:41:50.71 |
-06:09:17.0 |
HIP 47539 |
15.10 |
| 2026-02-19 12:00 |
09:41:49.04 |
-06:09:07.0 |
HIP 47539 |
15.13 |
| 2026-02-20 00:00 |
09:41:47.38 |
-06:08:57.0 |
HIP 47539 |
15.18 |
| 2026-02-20 12:00 |
09:41:45.71 |
-06:08:46.8 |
HIP 47539 |
15.24 |
| 2026-02-21 00:00 |
09:41:44.05 |
-06:08:36.6 |
HIP 47539 |
15.31 |
| 2026-02-21 12:00 |
09:41:42.39 |
-06:08:26.4 |
HIP 47539 |
15.40 |
| 2026-02-22 00:00 |
09:41:40.74 |
-06:08:16.1 |
HIP 47539 |
15.51 |
| 2026-02-22 12:00 |
09:41:39.08 |
-06:08:05.7 |
HIP 47539 |
15.62 |
| 2026-02-23 00:00 |
09:41:37.43 |
-06:07:55.2 |
HIP 47539 |
15.75 |
| 2026-02-23 12:00 |
09:41:35.79 |
-06:07:44.7 |
HIP 47539 |
15.90 |
| 2026-02-24 00:00 |
09:41:34.14 |
-06:07:34.2 |
HIP 47539 |
16.05 |