C/1879 M1 (Swift)
メタデータ
| 項目 |
値 |
| Designation |
C/1879 M1 (Swift) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1879-04-27T22:12:15.344640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:51Z |
| Obs used |
16 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
17.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1879-07-15.0000000 |
| e |
1.00000000 |
| q (au) |
0.896364 |
| a (au) |
- |
| i (deg) |
107.044636 |
| Ω (om, deg) |
47.452641 |
| ω (w, deg) |
3.742746 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
15:12:50.76 |
-13:00:14.8 |
HIP 74301 |
23.87 |
| 2026-02-03 12:00 |
15:12:50.85 |
-13:00:14.3 |
HIP 74301 |
23.90 |
| 2026-02-04 00:00 |
15:12:50.93 |
-13:00:13.7 |
HIP 74301 |
23.92 |
| 2026-02-04 12:00 |
15:12:51.01 |
-13:00:13.1 |
HIP 74301 |
23.94 |
| 2026-02-05 00:00 |
15:12:51.08 |
-13:00:12.5 |
HIP 74301 |
23.96 |
| 2026-02-05 12:00 |
15:12:51.14 |
-13:00:11.9 |
HIP 74301 |
23.97 |
| 2026-02-06 00:00 |
15:12:51.20 |
-13:00:11.2 |
HIP 74301 |
23.99 |
| 2026-02-06 12:00 |
15:12:51.25 |
-13:00:10.6 |
HIP 74301 |
24.00 |
| 2026-02-07 00:00 |
15:12:51.29 |
-13:00:09.8 |
HIP 74301 |
24.01 |
| 2026-02-07 12:00 |
15:12:51.33 |
-13:00:09.1 |
HIP 74301 |
24.02 |
| 2026-02-08 00:00 |
15:12:51.36 |
-13:00:08.3 |
HIP 74301 |
24.03 |
| 2026-02-08 12:00 |
15:12:51.38 |
-13:00:07.5 |
HIP 74301 |
24.04 |
| 2026-02-09 00:00 |
15:12:51.40 |
-13:00:06.7 |
HIP 74301 |
24.05 |
| 2026-02-09 12:00 |
15:12:51.41 |
-13:00:05.9 |
HIP 74301 |
24.05 |
| 2026-02-10 00:00 |
15:12:51.41 |
-13:00:05.0 |
HIP 74301 |
24.05 |
| 2026-02-10 12:00 |
15:12:51.41 |
-13:00:04.1 |
HIP 74301 |
24.05 |
| 2026-02-11 00:00 |
15:12:51.40 |
-13:00:03.2 |
HIP 74301 |
24.05 |
| 2026-02-11 12:00 |
15:12:51.39 |
-13:00:02.2 |
HIP 74301 |
24.05 |
| 2026-02-12 00:00 |
15:12:51.36 |
-13:00:01.2 |
HIP 74301 |
24.05 |
| 2026-02-12 12:00 |
15:12:51.33 |
-13:00:00.2 |
HIP 74301 |
24.04 |
| 2026-02-13 00:00 |
15:12:51.30 |
-12:59:59.2 |
HIP 74301 |
24.04 |
| 2026-02-13 12:00 |
15:12:51.25 |
-12:59:58.1 |
HIP 74301 |
24.03 |
| 2026-02-14 00:00 |
15:12:51.21 |
-12:59:57.0 |
HIP 74301 |
24.02 |
| 2026-02-14 12:00 |
15:12:51.15 |
-12:59:55.9 |
HIP 74301 |
24.01 |
| 2026-02-15 00:00 |
15:12:51.09 |
-12:59:54.8 |
HIP 74301 |
24.00 |
| 2026-02-15 12:00 |
15:12:51.02 |
-12:59:53.6 |
HIP 74301 |
23.98 |
| 2026-02-16 00:00 |
15:12:50.94 |
-12:59:52.4 |
HIP 74301 |
23.97 |
| 2026-02-16 12:00 |
15:12:50.86 |
-12:59:51.2 |
HIP 74301 |
23.95 |
| 2026-02-17 00:00 |
15:12:50.77 |
-12:59:50.0 |
HIP 74301 |
23.93 |
| 2026-02-17 12:00 |
15:12:50.67 |
-12:59:48.7 |
HIP 74301 |
23.91 |
| 2026-02-18 00:00 |
15:12:50.57 |
-12:59:47.4 |
HIP 74301 |
23.89 |
| 2026-02-18 12:00 |
15:12:50.46 |
-12:59:46.1 |
HIP 74301 |
23.87 |
| 2026-02-19 00:00 |
15:12:50.35 |
-12:59:44.7 |
HIP 74301 |
23.84 |
| 2026-02-19 12:00 |
15:12:50.23 |
-12:59:43.4 |
HIP 74301 |
23.82 |
| 2026-02-20 00:00 |
15:12:50.10 |
-12:59:42.0 |
HIP 74301 |
23.79 |
| 2026-02-20 12:00 |
15:12:49.96 |
-12:59:40.6 |
HIP 74301 |
23.76 |
| 2026-02-21 00:00 |
15:12:49.82 |
-12:59:39.1 |
HIP 74301 |
23.73 |
| 2026-02-21 12:00 |
15:12:49.67 |
-12:59:37.7 |
HIP 74301 |
23.70 |
| 2026-02-22 00:00 |
15:12:49.52 |
-12:59:36.2 |
HIP 74301 |
23.66 |
| 2026-02-22 12:00 |
15:12:49.36 |
-12:59:34.6 |
HIP 74301 |
23.63 |
| 2026-02-23 00:00 |
15:12:49.19 |
-12:59:33.1 |
HIP 74301 |
23.59 |
| 2026-02-23 12:00 |
15:12:49.01 |
-12:59:31.5 |
HIP 74301 |
23.56 |
| 2026-02-24 00:00 |
15:12:48.83 |
-12:59:30.0 |
HIP 74301 |
23.52 |