メタデータ
| 項目 |
値 |
| Designation |
C/1978 R3 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1978-08-13T16:08:35.136960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:27Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
8.300 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1978-11-02.0000000 |
| e |
1.00028144 |
| q (au) |
1.771588 |
| a (au) |
-6294.758943 |
| i (deg) |
130.636426 |
| Ω (om, deg) |
290.677833 |
| ω (w, deg) |
224.754011 |
| M (ma, deg) |
0.000159 |
等級
散乱 + 全体線形
$$
M_a = (7.180 + 2.924\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.180 |
| n |
2.924 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
18:10:51.34 |
-03:11:38.9 |
HIP 89068 |
13.64 |
| 2026-06-01 12:00 |
18:10:49.79 |
-03:11:35.6 |
HIP 89068 |
13.53 |
| 2026-06-02 00:00 |
18:10:48.24 |
-03:11:32.4 |
HIP 89068 |
13.42 |
| 2026-06-02 12:00 |
18:10:46.69 |
-03:11:29.2 |
HIP 89068 |
13.33 |
| 2026-06-03 00:00 |
18:10:45.13 |
-03:11:26.1 |
HIP 89068 |
13.25 |
| 2026-06-03 12:00 |
18:10:43.57 |
-03:11:23.1 |
HIP 89068 |
13.18 |
| 2026-06-04 00:00 |
18:10:42.00 |
-03:11:20.1 |
HIP 89068 |
13.13 |
| 2026-06-04 12:00 |
18:10:40.42 |
-03:11:17.3 |
HIP 89068 |
13.09 |
| 2026-06-05 00:00 |
18:10:38.84 |
-03:11:14.4 |
HIP 89068 |
13.06 |
| 2026-06-05 12:00 |
18:10:37.26 |
-03:11:11.7 |
HIP 89068 |
13.04 |
| 2026-06-06 00:00 |
18:10:35.67 |
-03:11:09.0 |
HIP 89068 |
13.04 |
| 2026-06-06 12:00 |
18:10:34.08 |
-03:11:06.4 |
HIP 89068 |
13.05 |
| 2026-06-07 00:00 |
18:10:32.49 |
-03:11:03.8 |
HIP 89068 |
13.07 |
| 2026-06-07 12:00 |
18:10:30.89 |
-03:11:01.4 |
HIP 89068 |
13.11 |
| 2026-06-08 00:00 |
18:10:29.28 |
-03:10:59.0 |
HIP 89068 |
13.16 |
| 2026-06-08 12:00 |
18:10:27.68 |
-03:10:56.6 |
HIP 89068 |
13.23 |
| 2026-06-09 00:00 |
18:10:26.07 |
-03:10:54.4 |
HIP 89068 |
13.31 |
| 2026-06-09 12:00 |
18:10:24.45 |
-03:10:52.2 |
HIP 89068 |
13.40 |
| 2026-06-10 00:00 |
18:10:22.83 |
-03:10:50.0 |
HIP 89068 |
13.50 |
| 2026-06-10 12:00 |
18:10:21.21 |
-03:10:48.0 |
HIP 89068 |
13.62 |
| 2026-06-11 00:00 |
18:10:19.59 |
-03:10:46.0 |
HIP 89068 |
13.75 |
| 2026-06-11 12:00 |
18:10:17.96 |
-03:10:44.1 |
HIP 89068 |
13.89 |
| 2026-06-12 00:00 |
18:10:16.33 |
-03:10:42.2 |
HIP 89068 |
14.04 |
| 2026-06-12 12:00 |
18:10:14.69 |
-03:10:40.5 |
HIP 89068 |
14.21 |
| 2026-06-13 00:00 |
18:10:13.06 |
-03:10:38.8 |
HIP 89068 |
14.39 |
| 2026-06-13 12:00 |
18:10:11.42 |
-03:10:37.1 |
HIP 89068 |
14.57 |
| 2026-06-14 00:00 |
18:10:09.78 |
-03:10:35.6 |
HIP 89068 |
14.77 |
| 2026-06-14 12:00 |
18:10:08.13 |
-03:10:34.1 |
HIP 89068 |
14.98 |
| 2026-06-15 00:00 |
18:10:06.49 |
-03:10:32.7 |
HIP 89068 |
15.19 |
| 2026-06-15 12:00 |
18:10:04.84 |
-03:10:31.3 |
HIP 89068 |
15.42 |
| 2026-06-16 00:00 |
18:10:03.19 |
-03:10:30.1 |
HIP 89068 |
15.65 |
| 2026-06-16 12:00 |
18:10:01.54 |
-03:10:28.9 |
HIP 89068 |
15.90 |
| 2026-06-17 00:00 |
18:09:59.88 |
-03:10:27.8 |
HIP 88944 |
15.67 |
| 2026-06-17 12:00 |
18:09:58.23 |
-03:10:26.7 |
HIP 88944 |
15.38 |
| 2026-06-18 00:00 |
18:09:56.57 |
-03:10:25.7 |
HIP 88944 |
15.10 |
| 2026-06-18 12:00 |
18:09:54.91 |
-03:10:24.8 |
HIP 88944 |
14.83 |
| 2026-06-19 00:00 |
18:09:53.25 |
-03:10:24.0 |
HIP 88944 |
14.56 |
| 2026-06-19 12:00 |
18:09:51.59 |
-03:10:23.2 |
HIP 88944 |
14.30 |
| 2026-06-20 00:00 |
18:09:49.93 |
-03:10:22.5 |
HIP 88944 |
14.05 |
| 2026-06-20 12:00 |
18:09:48.27 |
-03:10:21.9 |
HIP 88944 |
13.81 |
| 2026-06-21 00:00 |
18:09:46.60 |
-03:10:21.3 |
HIP 88944 |
13.58 |
| 2026-06-21 12:00 |
18:09:44.94 |
-03:10:20.9 |
HIP 88944 |
13.36 |
| 2026-06-22 00:00 |
18:09:43.28 |
-03:10:20.5 |
HIP 88944 |
13.15 |