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 |
0.991 |
| gb |
-0.978 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
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 |
| 2026-06-02 12:00 |
09:39:11.93 |
-05:31:20.2 |
HIP 47284 |
26.03 |
| 2026-06-03 00:00 |
09:39:12.45 |
-05:31:13.9 |
HIP 47284 |
26.02 |
| 2026-06-03 12:00 |
09:39:12.99 |
-05:31:07.7 |
HIP 47284 |
26.01 |
| 2026-06-04 00:00 |
09:39:13.54 |
-05:31:01.6 |
HIP 47284 |
26.01 |
| 2026-06-04 12:00 |
09:39:14.11 |
-05:30:55.6 |
HIP 47284 |
26.01 |
| 2026-06-05 00:00 |
09:39:14.68 |
-05:30:49.6 |
HIP 47284 |
26.02 |
| 2026-06-05 12:00 |
09:39:15.27 |
-05:30:43.8 |
HIP 47284 |
26.03 |
| 2026-06-06 00:00 |
09:39:15.87 |
-05:30:38.0 |
HIP 47284 |
26.04 |
| 2026-06-06 12:00 |
09:39:16.48 |
-05:30:32.4 |
HIP 47284 |
26.06 |
| 2026-06-07 00:00 |
09:39:17.11 |
-05:30:26.8 |
HIP 47284 |
26.08 |
| 2026-06-07 12:00 |
09:39:17.75 |
-05:30:21.3 |
HIP 47284 |
26.11 |
| 2026-06-08 00:00 |
09:39:18.40 |
-05:30:15.9 |
HIP 47284 |
26.14 |
| 2026-06-08 12:00 |
09:39:19.06 |
-05:30:10.6 |
HIP 47284 |
26.18 |
| 2026-06-09 00:00 |
09:39:19.73 |
-05:30:05.4 |
HIP 47284 |
26.22 |
| 2026-06-09 12:00 |
09:39:20.42 |
-05:30:00.3 |
HIP 47284 |
26.27 |
| 2026-06-10 00:00 |
09:39:21.12 |
-05:29:55.2 |
HIP 47284 |
26.31 |
| 2026-06-10 12:00 |
09:39:21.83 |
-05:29:50.3 |
HIP 47284 |
26.37 |
| 2026-06-11 00:00 |
09:39:22.55 |
-05:29:45.4 |
HIP 47284 |
26.43 |
| 2026-06-11 12:00 |
09:39:23.28 |
-05:29:40.7 |
HIP 47284 |
26.49 |
| 2026-06-12 00:00 |
09:39:24.03 |
-05:29:36.0 |
HIP 47284 |
26.56 |
| 2026-06-12 12:00 |
09:39:24.79 |
-05:29:31.5 |
HIP 47284 |
26.63 |
| 2026-06-13 00:00 |
09:39:25.56 |
-05:29:27.0 |
HIP 47284 |
26.70 |
| 2026-06-13 12:00 |
09:39:26.34 |
-05:29:22.6 |
HIP 47284 |
26.79 |
| 2026-06-14 00:00 |
09:39:27.13 |
-05:29:18.3 |
HIP 47284 |
26.87 |
| 2026-06-14 12:00 |
09:39:27.94 |
-05:29:14.1 |
HIP 47284 |
26.96 |
| 2026-06-15 00:00 |
09:39:28.75 |
-05:29:10.0 |
HIP 47284 |
27.05 |
| 2026-06-15 12:00 |
09:39:29.58 |
-05:29:06.0 |
HIP 47284 |
27.15 |
| 2026-06-16 00:00 |
09:39:30.42 |
-05:29:02.1 |
HIP 47284 |
27.26 |
| 2026-06-16 12:00 |
09:39:31.27 |
-05:28:58.3 |
HIP 47284 |
27.36 |
| 2026-06-17 00:00 |
09:39:32.13 |
-05:28:54.5 |
HIP 47284 |
27.48 |
| 2026-06-17 12:00 |
09:39:33.01 |
-05:28:50.9 |
HIP 47284 |
27.59 |
| 2026-06-18 00:00 |
09:39:33.89 |
-05:28:47.4 |
HIP 47284 |
27.71 |
| 2026-06-18 12:00 |
09:39:34.78 |
-05:28:43.9 |
HIP 47284 |
27.84 |
| 2026-06-19 00:00 |
09:39:35.69 |
-05:28:40.6 |
HIP 47284 |
27.97 |
| 2026-06-19 12:00 |
09:39:36.61 |
-05:28:37.3 |
HIP 47284 |
28.10 |
| 2026-06-20 00:00 |
09:39:37.53 |
-05:28:34.2 |
HIP 47284 |
28.24 |
| 2026-06-20 12:00 |
09:39:38.47 |
-05:28:31.1 |
HIP 47284 |
28.38 |
| 2026-06-21 00:00 |
09:39:39.42 |
-05:28:28.2 |
HIP 47284 |
28.53 |
| 2026-06-21 12:00 |
09:39:40.38 |
-05:28:25.3 |
HIP 47284 |
28.68 |
| 2026-06-22 00:00 |
09:39:41.35 |
-05:28:22.5 |
HIP 47284 |
28.84 |