メタデータ
| 項目 |
値 |
| Designation |
C/1953 G1 (Mrkos-Honda) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1953-05-26T10:29:28.317120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:12Z |
| Obs used |
7 |
| 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) |
1953-07-09.0000000 |
| e |
0.99746509 |
| q (au) |
1.022127 |
| a (au) |
403.221047 |
| i (deg) |
93.856976 |
| Ω (om, deg) |
275.885480 |
| ω (w, deg) |
85.742269 |
| M (ma, deg) |
0.005303 |
等級
散乱 + 全体線形
$$
M_a = (7.774 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.774 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.544 |
| k |
0.800 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 1953-04-14 |
1953-05-25 |
+53.5483 |
-1.301 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
05:42:25.18 |
-50:34:51.2 |
HIP 26883 |
6.35 |
| 2026-03-26 12:00 |
05:42:25.47 |
-50:34:33.5 |
HIP 26883 |
6.05 |
| 2026-03-27 00:00 |
05:42:25.77 |
-50:34:15.8 |
HIP 26883 |
5.75 |
| 2026-03-27 12:00 |
05:42:26.09 |
-50:33:58.2 |
HIP 26883 |
5.46 |
| 2026-03-28 00:00 |
05:42:26.43 |
-50:33:40.5 |
HIP 26883 |
5.16 |
| 2026-03-28 12:00 |
05:42:26.78 |
-50:33:22.9 |
HIP 26883 |
4.87 |
| 2026-03-29 00:00 |
05:42:27.15 |
-50:33:05.4 |
HIP 26883 |
4.57 |
| 2026-03-29 12:00 |
05:42:27.54 |
-50:32:47.8 |
HIP 26883 |
4.28 |
| 2026-03-30 00:00 |
05:42:27.94 |
-50:32:30.3 |
HIP 26883 |
3.99 |
| 2026-03-30 12:00 |
05:42:28.36 |
-50:32:12.9 |
HIP 26883 |
3.70 |
| 2026-03-31 00:00 |
05:42:28.79 |
-50:31:55.4 |
HIP 26883 |
3.41 |
| 2026-03-31 12:00 |
05:42:29.25 |
-50:31:38.1 |
HIP 26883 |
3.13 |
| 2026-04-01 00:00 |
05:42:29.71 |
-50:31:20.7 |
HIP 26883 |
2.85 |
| 2026-04-01 12:00 |
05:42:30.20 |
-50:31:03.4 |
HIP 26883 |
2.58 |
| 2026-04-02 00:00 |
05:42:30.70 |
-50:30:46.1 |
HIP 26883 |
2.31 |
| 2026-04-02 12:00 |
05:42:31.21 |
-50:30:28.9 |
HIP 26883 |
2.06 |
| 2026-04-03 00:00 |
05:42:31.75 |
-50:30:11.7 |
HIP 26883 |
1.82 |
| 2026-04-03 12:00 |
05:42:32.29 |
-50:29:54.6 |
HIP 26883 |
1.60 |
| 2026-04-04 00:00 |
05:42:32.86 |
-50:29:37.5 |
HIP 26883 |
1.41 |
| 2026-04-04 12:00 |
05:42:33.44 |
-50:29:20.4 |
HIP 26883 |
1.27 |
| 2026-04-05 00:00 |
05:42:34.04 |
-50:29:03.4 |
HIP 26883 |
1.19 |
| 2026-04-05 12:00 |
05:42:34.65 |
-50:28:46.5 |
HIP 26883 |
1.19 |
| 2026-04-06 00:00 |
05:42:35.28 |
-50:28:29.6 |
HIP 26883 |
1.26 |
| 2026-04-06 12:00 |
05:42:35.92 |
-50:28:12.7 |
HIP 26883 |
1.39 |
| 2026-04-07 00:00 |
05:42:36.58 |
-50:27:55.9 |
HIP 26883 |
1.58 |
| 2026-04-07 12:00 |
05:42:37.25 |
-50:27:39.2 |
HIP 26883 |
1.79 |
| 2026-04-08 00:00 |
05:42:37.94 |
-50:27:22.5 |
HIP 26883 |
2.03 |
| 2026-04-08 12:00 |
05:42:38.65 |
-50:27:05.9 |
HIP 26883 |
2.29 |
| 2026-04-09 00:00 |
05:42:39.37 |
-50:26:49.3 |
HIP 26883 |
2.55 |
| 2026-04-09 12:00 |
05:42:40.11 |
-50:26:32.8 |
HIP 26883 |
2.83 |
| 2026-04-10 00:00 |
05:42:40.86 |
-50:26:16.3 |
HIP 26883 |
3.11 |
| 2026-04-10 12:00 |
05:42:41.63 |
-50:26:00.0 |
HIP 26883 |
3.39 |
| 2026-04-11 00:00 |
05:42:42.41 |
-50:25:43.6 |
HIP 26883 |
3.68 |
| 2026-04-11 12:00 |
05:42:43.21 |
-50:25:27.3 |
HIP 26883 |
3.97 |
| 2026-04-12 00:00 |
05:42:44.02 |
-50:25:11.1 |
HIP 26883 |
4.26 |
| 2026-04-12 12:00 |
05:42:44.85 |
-50:24:55.0 |
HIP 26883 |
4.55 |
| 2026-04-13 00:00 |
05:42:45.69 |
-50:24:38.9 |
HIP 26883 |
4.85 |
| 2026-04-13 12:00 |
05:42:46.55 |
-50:24:22.9 |
HIP 26883 |
5.14 |
| 2026-04-14 00:00 |
05:42:47.42 |
-50:24:07.0 |
HIP 26883 |
5.44 |
| 2026-04-14 12:00 |
05:42:48.31 |
-50:23:51.1 |
HIP 26883 |
5.73 |
| 2026-04-15 00:00 |
05:42:49.21 |
-50:23:35.4 |
HIP 26883 |
6.03 |
| 2026-04-15 12:00 |
05:42:50.13 |
-50:23:19.6 |
HIP 26883 |
6.33 |
| 2026-04-16 00:00 |
05:42:51.06 |
-50:23:04.0 |
HIP 26883 |
6.63 |