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) |
| 2026-05-12 00:00 |
09:39:01.79 |
-05:37:07.7 |
HIP 47284 |
29.82 |
| 2026-05-12 12:00 |
09:39:01.74 |
-05:36:58.0 |
HIP 47284 |
29.67 |
| 2026-05-13 00:00 |
09:39:01.70 |
-05:36:48.4 |
HIP 47284 |
29.52 |
| 2026-05-13 12:00 |
09:39:01.68 |
-05:36:38.9 |
HIP 47284 |
29.38 |
| 2026-05-14 00:00 |
09:39:01.67 |
-05:36:29.4 |
HIP 47284 |
29.23 |
| 2026-05-14 12:00 |
09:39:01.68 |
-05:36:20.1 |
HIP 47284 |
29.09 |
| 2026-05-15 00:00 |
09:39:01.70 |
-05:36:10.7 |
HIP 47284 |
28.95 |
| 2026-05-15 12:00 |
09:39:01.73 |
-05:36:01.5 |
HIP 47284 |
28.82 |
| 2026-05-16 00:00 |
09:39:01.78 |
-05:35:52.3 |
HIP 47284 |
28.68 |
| 2026-05-16 12:00 |
09:39:01.84 |
-05:35:43.2 |
HIP 47284 |
28.55 |
| 2026-05-17 00:00 |
09:39:01.91 |
-05:35:34.2 |
HIP 47284 |
28.43 |
| 2026-05-17 12:00 |
09:39:02.00 |
-05:35:25.2 |
HIP 47284 |
28.30 |
| 2026-05-18 00:00 |
09:39:02.10 |
-05:35:16.3 |
HIP 47284 |
28.18 |
| 2026-05-18 12:00 |
09:39:02.22 |
-05:35:07.5 |
HIP 47284 |
28.06 |
| 2026-05-19 00:00 |
09:39:02.35 |
-05:34:58.8 |
HIP 47284 |
27.95 |
| 2026-05-19 12:00 |
09:39:02.49 |
-05:34:50.1 |
HIP 47284 |
27.83 |
| 2026-05-20 00:00 |
09:39:02.65 |
-05:34:41.5 |
HIP 47284 |
27.72 |
| 2026-05-20 12:00 |
09:39:02.82 |
-05:34:33.0 |
HIP 47284 |
27.62 |
| 2026-05-21 00:00 |
09:39:03.00 |
-05:34:24.6 |
HIP 47284 |
27.51 |
| 2026-05-21 12:00 |
09:39:03.20 |
-05:34:16.3 |
HIP 47284 |
27.41 |
| 2026-05-22 00:00 |
09:39:03.41 |
-05:34:08.0 |
HIP 47284 |
27.31 |
| 2026-05-22 12:00 |
09:39:03.64 |
-05:33:59.8 |
HIP 47284 |
27.22 |
| 2026-05-23 00:00 |
09:39:03.87 |
-05:33:51.7 |
HIP 47284 |
27.13 |
| 2026-05-23 12:00 |
09:39:04.13 |
-05:33:43.6 |
HIP 47284 |
27.04 |
| 2026-05-24 00:00 |
09:39:04.39 |
-05:33:35.7 |
HIP 47284 |
26.96 |
| 2026-05-24 12:00 |
09:39:04.67 |
-05:33:27.8 |
HIP 47284 |
26.88 |
| 2026-05-25 00:00 |
09:39:04.96 |
-05:33:20.0 |
HIP 47284 |
26.80 |
| 2026-05-25 12:00 |
09:39:05.27 |
-05:33:12.3 |
HIP 47284 |
26.72 |
| 2026-05-26 00:00 |
09:39:05.59 |
-05:33:04.7 |
HIP 47284 |
26.65 |
| 2026-05-26 12:00 |
09:39:05.92 |
-05:32:57.1 |
HIP 47284 |
26.58 |
| 2026-05-27 00:00 |
09:39:06.26 |
-05:32:49.7 |
HIP 47284 |
26.52 |
| 2026-05-27 12:00 |
09:39:06.62 |
-05:32:42.3 |
HIP 47284 |
26.46 |
| 2026-05-28 00:00 |
09:39:06.99 |
-05:32:35.0 |
HIP 47284 |
26.40 |
| 2026-05-28 12:00 |
09:39:07.38 |
-05:32:27.7 |
HIP 47284 |
26.35 |
| 2026-05-29 00:00 |
09:39:07.77 |
-05:32:20.6 |
HIP 47284 |
26.30 |
| 2026-05-29 12:00 |
09:39:08.18 |
-05:32:13.6 |
HIP 47284 |
26.26 |
| 2026-05-30 00:00 |
09:39:08.61 |
-05:32:06.6 |
HIP 47284 |
26.21 |
| 2026-05-30 12:00 |
09:39:09.04 |
-05:31:59.7 |
HIP 47284 |
26.18 |
| 2026-05-31 00:00 |
09:39:09.49 |
-05:31:52.9 |
HIP 47284 |
26.14 |
| 2026-05-31 12:00 |
09:39:09.95 |
-05:31:46.2 |
HIP 47284 |
26.11 |
| 2026-06-01 00:00 |
09:39:10.43 |
-05:31:39.6 |
HIP 47284 |
26.08 |
| 2026-06-01 12:00 |
09:39:10.92 |
-05:31:33.0 |
HIP 47284 |
26.06 |
| 2026-06-02 00:00 |
09:39:11.42 |
-05:31:26.6 |
HIP 47284 |
26.04 |