メタデータ
| 項目 |
値 |
| Designation |
C/2023 H2 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-10-29T04:33:37.779840Z |
| Orbit solution date (soln_date, UTC) |
2024-07-30T14:57:25Z |
| Obs used |
724 |
| NEO |
- |
| M1 |
16.100 |
| K1 |
5.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-04-23T06:42:47.548800Z |
| Discovery magnitude (MPC) |
20.78 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2023-10-07.0000000 |
| e |
0.99628184 |
| q (au) |
0.894405 |
| a (au) |
240.550492 |
| i (deg) |
113.753483 |
| Ω (om, deg) |
217.044806 |
| ω (w, deg) |
150.650349 |
| M (ma, deg) |
359.994138 |
等級
散乱 + 全体線形
$$
M_a = (13.783 + 4.803\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.783 |
| n |
4.803 |
| gf |
0.800 |
| gb |
-0.500 |
| 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 |
| 2023-03-26 |
2023-10-28 |
+3.5183 |
-1.258 |
| 2023-10-29 |
2024-02-05 |
-12.4077 |
-0.879 |
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 |
17:51:36.28 |
-80:41:00.0 |
HIP 86626 |
23.37 |
| 2026-03-26 12:00 |
17:51:14.40 |
-80:43:25.2 |
HIP 86626 |
22.70 |
| 2026-03-27 00:00 |
17:50:51.63 |
-80:45:50.2 |
HIP 86626 |
22.29 |
| 2026-03-27 12:00 |
17:50:27.97 |
-80:48:14.9 |
HIP 86626 |
22.14 |
| 2026-03-28 00:00 |
17:50:03.40 |
-80:50:39.3 |
HIP 86626 |
22.27 |
| 2026-03-28 12:00 |
17:49:37.92 |
-80:53:03.3 |
HIP 86626 |
22.67 |
| 2026-03-29 00:00 |
17:49:11.52 |
-80:55:27.0 |
HIP 86626 |
23.34 |
| 2026-03-29 12:00 |
17:48:44.19 |
-80:57:50.3 |
HIP 86626 |
24.25 |
| 2026-03-30 00:00 |
17:48:15.91 |
-81:00:13.3 |
HIP 86626 |
25.37 |
| 2026-03-30 12:00 |
17:47:46.68 |
-81:02:35.8 |
HIP 86626 |
26.69 |
| 2026-03-31 00:00 |
17:47:16.49 |
-81:04:57.9 |
HIP 86626 |
28.18 |
| 2026-03-31 12:00 |
17:46:45.32 |
-81:07:19.5 |
HIP 86012 |
28.14 |
| 2026-04-01 00:00 |
17:46:13.17 |
-81:09:40.6 |
HIP 86012 |
27.23 |
| 2026-04-01 12:00 |
17:45:40.03 |
-81:12:01.3 |
HIP 86012 |
26.52 |
| 2026-04-02 00:00 |
17:45:05.88 |
-81:14:21.3 |
HIP 86012 |
26.05 |
| 2026-04-02 12:00 |
17:44:30.72 |
-81:16:40.9 |
HIP 86012 |
25.82 |
| 2026-04-03 00:00 |
17:43:54.53 |
-81:18:59.8 |
HIP 86012 |
25.84 |
| 2026-04-03 12:00 |
17:43:17.31 |
-81:21:18.1 |
HIP 86012 |
26.11 |
| 2026-04-04 00:00 |
17:42:39.05 |
-81:23:35.7 |
HIP 86012 |
26.63 |
| 2026-04-04 12:00 |
17:41:59.73 |
-81:25:52.7 |
HIP 85714 |
26.78 |
| 2026-04-05 00:00 |
17:41:19.35 |
-81:28:09.0 |
HIP 85714 |
24.50 |
| 2026-04-05 12:00 |
17:40:37.90 |
-81:30:24.5 |
HIP 85714 |
22.30 |
| 2026-04-06 00:00 |
17:39:55.36 |
-81:32:39.3 |
HIP 85714 |
20.20 |
| 2026-04-06 12:00 |
17:39:11.73 |
-81:34:53.3 |
HIP 85714 |
18.24 |
| 2026-04-07 00:00 |
17:38:27.00 |
-81:37:06.5 |
HIP 85714 |
16.49 |
| 2026-04-07 12:00 |
17:37:41.16 |
-81:39:18.8 |
HIP 85714 |
15.01 |
| 2026-04-08 00:00 |
17:36:54.20 |
-81:41:30.3 |
HIP 85714 |
13.90 |
| 2026-04-08 12:00 |
17:36:06.11 |
-81:43:40.8 |
HIP 85714 |
13.26 |
| 2026-04-09 00:00 |
17:35:16.88 |
-81:45:50.4 |
HIP 85714 |
13.16 |
| 2026-04-09 12:00 |
17:34:26.51 |
-81:47:59.0 |
HIP 85714 |
13.63 |
| 2026-04-10 00:00 |
17:33:34.98 |
-81:50:06.5 |
HIP 85714 |
14.60 |
| 2026-04-10 12:00 |
17:32:42.30 |
-81:52:13.1 |
HIP 85714 |
16.00 |
| 2026-04-11 00:00 |
17:31:48.45 |
-81:54:18.5 |
HIP 85714 |
17.72 |
| 2026-04-11 12:00 |
17:30:53.43 |
-81:56:22.8 |
HIP 85714 |
19.69 |
| 2026-04-12 00:00 |
17:29:57.22 |
-81:58:26.0 |
HIP 85714 |
21.84 |
| 2026-04-12 12:00 |
17:28:59.83 |
-82:00:28.0 |
HIP 85714 |
24.12 |
| 2026-04-13 00:00 |
17:28:01.25 |
-82:02:28.8 |
HIP 85714 |
26.51 |
| 2026-04-13 12:00 |
17:27:01.47 |
-82:04:28.3 |
HIP 85714 |
28.98 |
| 2026-04-14 00:00 |
17:26:00.50 |
-82:06:26.5 |
HIP 86210 |
29.50 |
| 2026-04-14 12:00 |
17:24:58.31 |
-82:08:23.3 |
HIP 84219 |
28.55 |
| 2026-04-15 00:00 |
17:23:54.92 |
-82:10:18.8 |
HIP 84219 |
25.69 |
| 2026-04-15 12:00 |
17:22:50.32 |
-82:12:12.9 |
HIP 84219 |
22.83 |
| 2026-04-16 00:00 |
17:21:44.51 |
-82:14:05.5 |
HIP 84219 |
19.97 |