C/1994 T1 (Machholz)
メタデータ
| 項目 |
値 |
| Designation |
C/1994 T1 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-10-02T13:22:18.399360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
344 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
5.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1994-11-26.0000000 |
| e |
0.99949492 |
| q (au) |
1.845392 |
| a (au) |
3653.643991 |
| i (deg) |
101.737600 |
| Ω (om, deg) |
249.943625 |
| ω (w, deg) |
142.784278 |
| M (ma, deg) |
0.000243 |
等級
散乱 + 全体線形
$$
M_a = (9.712 + 3.102\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.712 |
| n |
3.102 |
| gf |
1.000 |
| gb |
-0.544 |
| k |
0.800 |
| 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 |
17:53:49.34 |
-79:19:14.7 |
HIP 87327 |
9.08 |
| 2026-02-03 12:00 |
17:53:57.59 |
-79:19:33.2 |
HIP 87327 |
9.51 |
| 2026-02-04 00:00 |
17:54:05.77 |
-79:19:51.8 |
HIP 87327 |
9.95 |
| 2026-02-04 12:00 |
17:54:13.89 |
-79:20:10.6 |
HIP 87327 |
10.39 |
| 2026-02-05 00:00 |
17:54:21.94 |
-79:20:29.6 |
HIP 87327 |
10.84 |
| 2026-02-05 12:00 |
17:54:29.92 |
-79:20:48.7 |
HIP 87327 |
11.28 |
| 2026-02-06 00:00 |
17:54:37.84 |
-79:21:08.0 |
HIP 87327 |
11.72 |
| 2026-02-06 12:00 |
17:54:45.68 |
-79:21:27.4 |
HIP 87327 |
12.17 |
| 2026-02-07 00:00 |
17:54:53.46 |
-79:21:46.9 |
HIP 87327 |
12.62 |
| 2026-02-07 12:00 |
17:55:01.17 |
-79:22:06.6 |
HIP 87327 |
13.06 |
| 2026-02-08 00:00 |
17:55:08.80 |
-79:22:26.5 |
HIP 87327 |
13.51 |
| 2026-02-08 12:00 |
17:55:16.37 |
-79:22:46.5 |
HIP 87327 |
13.96 |
| 2026-02-09 00:00 |
17:55:23.86 |
-79:23:06.6 |
HIP 87327 |
14.40 |
| 2026-02-09 12:00 |
17:55:31.28 |
-79:23:26.9 |
HIP 87327 |
14.85 |
| 2026-02-10 00:00 |
17:55:38.63 |
-79:23:47.3 |
HIP 87327 |
15.30 |
| 2026-02-10 12:00 |
17:55:45.90 |
-79:24:07.8 |
HIP 87327 |
15.74 |
| 2026-02-11 00:00 |
17:55:53.10 |
-79:24:28.5 |
HIP 87327 |
16.19 |
| 2026-02-11 12:00 |
17:56:00.23 |
-79:24:49.3 |
HIP 87327 |
16.63 |
| 2026-02-12 00:00 |
17:56:07.28 |
-79:25:10.3 |
HIP 87327 |
17.07 |
| 2026-02-12 12:00 |
17:56:14.25 |
-79:25:31.4 |
HIP 87327 |
17.52 |
| 2026-02-13 00:00 |
17:56:21.15 |
-79:25:52.6 |
HIP 87327 |
17.96 |
| 2026-02-13 12:00 |
17:56:27.97 |
-79:26:14.0 |
HIP 87327 |
18.40 |
| 2026-02-14 00:00 |
17:56:34.71 |
-79:26:35.4 |
HIP 87327 |
18.84 |
| 2026-02-14 12:00 |
17:56:41.37 |
-79:26:57.1 |
HIP 87327 |
19.28 |
| 2026-02-15 00:00 |
17:56:47.95 |
-79:27:18.8 |
HIP 87327 |
19.72 |
| 2026-02-15 12:00 |
17:56:54.45 |
-79:27:40.7 |
HIP 87327 |
20.16 |
| 2026-02-16 00:00 |
17:57:00.88 |
-79:28:02.7 |
HIP 87327 |
20.60 |
| 2026-02-16 12:00 |
17:57:07.22 |
-79:28:24.8 |
HIP 87327 |
21.03 |
| 2026-02-17 00:00 |
17:57:13.48 |
-79:28:47.0 |
HIP 87327 |
21.47 |
| 2026-02-17 12:00 |
17:57:19.65 |
-79:29:09.3 |
HIP 87327 |
21.90 |
| 2026-02-18 00:00 |
17:57:25.75 |
-79:29:31.8 |
HIP 87327 |
22.34 |
| 2026-02-18 12:00 |
17:57:31.76 |
-79:29:54.4 |
HIP 87327 |
22.77 |
| 2026-02-19 00:00 |
17:57:37.68 |
-79:30:17.1 |
HIP 87327 |
23.20 |
| 2026-02-19 12:00 |
17:57:43.52 |
-79:30:39.9 |
HIP 87327 |
23.63 |
| 2026-02-20 00:00 |
17:57:49.28 |
-79:31:02.8 |
HIP 87327 |
24.06 |
| 2026-02-20 12:00 |
17:57:54.95 |
-79:31:25.9 |
HIP 87327 |
24.49 |
| 2026-02-21 00:00 |
17:58:00.53 |
-79:31:49.0 |
HIP 87327 |
24.91 |
| 2026-02-21 12:00 |
17:58:06.03 |
-79:32:12.2 |
HIP 87327 |
25.34 |
| 2026-02-22 00:00 |
17:58:11.44 |
-79:32:35.6 |
HIP 87327 |
25.76 |
| 2026-02-22 12:00 |
17:58:16.76 |
-79:32:59.0 |
HIP 87327 |
26.19 |
| 2026-02-23 00:00 |
17:58:21.99 |
-79:33:22.6 |
HIP 87327 |
26.61 |
| 2026-02-23 12:00 |
17:58:27.13 |
-79:33:46.3 |
HIP 87327 |
27.03 |
| 2026-02-24 00:00 |
17:58:32.19 |
-79:34:10.0 |
HIP 87327 |
27.45 |