C/1947 Y1 (Mrkos)
メタデータ
| 項目 |
値 |
| Designation |
C/1947 Y1 (Mrkos) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1948-02-16T15:01:24.922560Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:07Z |
| Obs used |
4 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1948-10-12.0000000 |
| e |
1.00041232 |
| q (au) |
1.499710 |
| a (au) |
-3637.212894 |
| i (deg) |
77.512349 |
| Ω (om, deg) |
199.310414 |
| ω (w, deg) |
61.913458 |
| M (ma, deg) |
0.001071 |
等級
散乱 + 全体線形
$$
M_a = (6.993 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.993 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.777 |
| k |
0.965 |
| 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 |
03:07:18.69 |
-31:17:06.4 |
HIP 14432 |
13.28 |
| 2026-02-03 12:00 |
03:07:18.58 |
-31:16:53.5 |
HIP 14432 |
13.29 |
| 2026-02-04 00:00 |
03:07:18.47 |
-31:16:40.7 |
HIP 14432 |
13.30 |
| 2026-02-04 12:00 |
03:07:18.38 |
-31:16:27.8 |
HIP 14432 |
13.32 |
| 2026-02-05 00:00 |
03:07:18.30 |
-31:16:14.9 |
HIP 14432 |
13.34 |
| 2026-02-05 12:00 |
03:07:18.23 |
-31:16:01.9 |
HIP 14432 |
13.37 |
| 2026-02-06 00:00 |
03:07:18.17 |
-31:15:48.9 |
HIP 14432 |
13.40 |
| 2026-02-06 12:00 |
03:07:18.13 |
-31:15:35.9 |
HIP 14432 |
13.45 |
| 2026-02-07 00:00 |
03:07:18.09 |
-31:15:22.8 |
HIP 14432 |
13.49 |
| 2026-02-07 12:00 |
03:07:18.07 |
-31:15:09.7 |
HIP 14432 |
13.55 |
| 2026-02-08 00:00 |
03:07:18.06 |
-31:14:56.6 |
HIP 14432 |
13.61 |
| 2026-02-08 12:00 |
03:07:18.06 |
-31:14:43.5 |
HIP 14432 |
13.67 |
| 2026-02-09 00:00 |
03:07:18.07 |
-31:14:30.3 |
HIP 14432 |
13.74 |
| 2026-02-09 12:00 |
03:07:18.09 |
-31:14:17.1 |
HIP 14432 |
13.82 |
| 2026-02-10 00:00 |
03:07:18.13 |
-31:14:03.9 |
HIP 14432 |
13.90 |
| 2026-02-10 12:00 |
03:07:18.18 |
-31:13:50.6 |
HIP 14432 |
13.99 |
| 2026-02-11 00:00 |
03:07:18.24 |
-31:13:37.4 |
HIP 14432 |
14.08 |
| 2026-02-11 12:00 |
03:07:18.31 |
-31:13:24.1 |
HIP 14432 |
14.18 |
| 2026-02-12 00:00 |
03:07:18.39 |
-31:13:10.8 |
HIP 14432 |
14.28 |
| 2026-02-12 12:00 |
03:07:18.48 |
-31:12:57.5 |
HIP 14432 |
14.39 |
| 2026-02-13 00:00 |
03:07:18.59 |
-31:12:44.1 |
HIP 14432 |
14.50 |
| 2026-02-13 12:00 |
03:07:18.70 |
-31:12:30.8 |
HIP 14432 |
14.62 |
| 2026-02-14 00:00 |
03:07:18.83 |
-31:12:17.4 |
HIP 14432 |
14.74 |
| 2026-02-14 12:00 |
03:07:18.97 |
-31:12:04.0 |
HIP 14432 |
14.87 |
| 2026-02-15 00:00 |
03:07:19.12 |
-31:11:50.6 |
HIP 14432 |
15.00 |
| 2026-02-15 12:00 |
03:07:19.29 |
-31:11:37.2 |
HIP 14432 |
15.14 |
| 2026-02-16 00:00 |
03:07:19.46 |
-31:11:23.7 |
HIP 14432 |
15.28 |
| 2026-02-16 12:00 |
03:07:19.65 |
-31:11:10.3 |
HIP 14432 |
15.43 |
| 2026-02-17 00:00 |
03:07:19.84 |
-31:10:56.8 |
HIP 14432 |
15.58 |
| 2026-02-17 12:00 |
03:07:20.05 |
-31:10:43.4 |
HIP 14432 |
15.73 |
| 2026-02-18 00:00 |
03:07:20.27 |
-31:10:29.9 |
HIP 14432 |
15.89 |
| 2026-02-18 12:00 |
03:07:20.51 |
-31:10:16.4 |
HIP 14432 |
16.05 |
| 2026-02-19 00:00 |
03:07:20.75 |
-31:10:03.0 |
HIP 14432 |
16.21 |
| 2026-02-19 12:00 |
03:07:21.00 |
-31:09:49.5 |
HIP 14432 |
16.38 |
| 2026-02-20 00:00 |
03:07:21.27 |
-31:09:36.0 |
HIP 14432 |
16.55 |
| 2026-02-20 12:00 |
03:07:21.55 |
-31:09:22.5 |
HIP 14432 |
16.73 |
| 2026-02-21 00:00 |
03:07:21.84 |
-31:09:09.0 |
HIP 14432 |
16.91 |
| 2026-02-21 12:00 |
03:07:22.14 |
-31:08:55.6 |
HIP 14432 |
17.09 |
| 2026-02-22 00:00 |
03:07:22.45 |
-31:08:42.1 |
HIP 14432 |
17.28 |
| 2026-02-22 12:00 |
03:07:22.77 |
-31:08:28.6 |
HIP 14432 |
17.47 |
| 2026-02-23 00:00 |
03:07:23.10 |
-31:08:15.1 |
HIP 14432 |
17.66 |
| 2026-02-23 12:00 |
03:07:23.45 |
-31:08:01.6 |
HIP 14432 |
17.85 |
| 2026-02-24 00:00 |
03:07:23.81 |
-31:07:48.2 |
HIP 14432 |
18.05 |