C/2023 S3 (Lemmon)
メタデータ
| 項目 |
値 |
| Designation |
C/2023 S3 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-01-19T14:58:00.491520Z |
| Orbit solution date (soln_date, UTC) |
2024-08-02T01:42:20Z |
| Obs used |
692 |
| NEO |
Yes |
| M1 |
16.300 |
| K1 |
9.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-09-25T10:53:32.726400Z |
| Discovery magnitude (MPC) |
19.99 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) |
2023-12-22.0000000 |
| e |
0.97084030 |
| q (au) |
0.830157 |
| a (au) |
28.469320 |
| i (deg) |
140.498019 |
| Ω (om, deg) |
233.833529 |
| ω (w, deg) |
281.571309 |
| M (ma, deg) |
359.814278 |
等級
散乱 + 全体線形
$$
M_a = (15.227 + 4.398\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.227 |
| n |
4.398 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2023-09-25 |
2023-12-03 |
-1.4088 |
+0.563 |
| 2023-12-03 |
2024-01-09 |
+26.1413 |
-1.820 |
| 2024-02-11 |
2024-03-08 |
+19.5558 |
-3.220 |
| 2024-03-08 |
2024-06-02 |
+1.6508 |
-1.231 |
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) |
| 2026-02-03 00:00 |
13:09:20.54 |
+35:29:55.0 |
HIP 64293 |
30.42 |
| 2026-02-03 12:00 |
13:09:10.00 |
+35:33:22.4 |
HIP 64293 |
28.76 |
| 2026-02-04 00:00 |
13:08:59.29 |
+35:36:49.8 |
HIP 64293 |
27.63 |
| 2026-02-04 12:00 |
13:08:48.43 |
+35:40:17.1 |
HIP 64293 |
27.09 |
| 2026-02-05 00:00 |
13:08:37.40 |
+35:43:44.3 |
HIP 64293 |
27.20 |
| 2026-02-05 12:00 |
13:08:26.21 |
+35:47:11.3 |
HIP 63999 |
27.13 |
| 2026-02-06 00:00 |
13:08:14.86 |
+35:50:38.2 |
HIP 63999 |
23.07 |
| 2026-02-06 12:00 |
13:08:03.35 |
+35:54:04.9 |
HIP 63999 |
19.02 |
| 2026-02-07 00:00 |
13:07:51.67 |
+35:57:31.4 |
HIP 63999 |
15.01 |
| 2026-02-07 12:00 |
13:07:39.84 |
+36:00:57.7 |
HIP 63999 |
11.09 |
| 2026-02-08 00:00 |
13:07:27.85 |
+36:04:23.8 |
HIP 63999 |
7.45 |
| 2026-02-08 12:00 |
13:07:15.70 |
+36:07:49.5 |
HIP 63999 |
4.80 |
| 2026-02-09 00:00 |
13:07:03.39 |
+36:11:15.0 |
HIP 64012 |
4.64 |
| 2026-02-09 12:00 |
13:06:50.92 |
+36:14:40.3 |
HIP 64012 |
2.03 |
| 2026-02-10 00:00 |
13:06:38.30 |
+36:18:05.1 |
HIP 64012 |
4.80 |
| 2026-02-10 12:00 |
13:06:25.52 |
+36:21:29.7 |
HIP 64012 |
8.86 |
| 2026-02-11 00:00 |
13:06:12.58 |
+36:24:53.9 |
HIP 64012 |
13.07 |
| 2026-02-11 12:00 |
13:05:59.49 |
+36:28:17.6 |
HIP 64012 |
17.34 |
| 2026-02-12 00:00 |
13:05:46.25 |
+36:31:41.0 |
HIP 63848 |
20.31 |
| 2026-02-12 12:00 |
13:05:32.85 |
+36:35:04.0 |
HIP 63848 |
22.66 |
| 2026-02-13 00:00 |
13:05:19.29 |
+36:38:26.5 |
HIP 63701 |
24.70 |
| 2026-02-13 12:00 |
13:05:05.59 |
+36:41:48.5 |
HIP 63701 |
22.42 |
| 2026-02-14 00:00 |
13:04:51.74 |
+36:45:10.0 |
HIP 63701 |
20.78 |
| 2026-02-14 12:00 |
13:04:37.73 |
+36:48:31.1 |
HIP 63817 |
17.55 |
| 2026-02-15 00:00 |
13:04:23.58 |
+36:51:51.5 |
HIP 63817 |
14.85 |
| 2026-02-15 12:00 |
13:04:09.27 |
+36:55:11.5 |
HIP 63817 |
13.11 |
| 2026-02-16 00:00 |
13:03:54.82 |
+36:58:30.8 |
HIP 63817 |
12.74 |
| 2026-02-16 12:00 |
13:03:40.23 |
+37:01:49.5 |
HIP 63817 |
13.87 |
| 2026-02-17 00:00 |
13:03:25.48 |
+37:05:07.6 |
HIP 63817 |
16.19 |
| 2026-02-17 12:00 |
13:03:10.60 |
+37:08:25.1 |
HIP 63622 |
15.62 |
| 2026-02-18 00:00 |
13:02:55.57 |
+37:11:41.9 |
HIP 63622 |
11.20 |
| 2026-02-18 12:00 |
13:02:40.40 |
+37:14:58.0 |
HIP 63622 |
6.79 |
| 2026-02-19 00:00 |
13:02:25.09 |
+37:18:13.4 |
HIP 63622 |
2.56 |
| 2026-02-19 12:00 |
13:02:09.64 |
+37:21:28.0 |
HIP 63622 |
2.62 |
| 2026-02-20 00:00 |
13:01:54.05 |
+37:24:41.9 |
HIP 63622 |
6.87 |
| 2026-02-20 12:00 |
13:01:38.33 |
+37:27:55.0 |
HIP 63529 |
7.62 |
| 2026-02-21 00:00 |
13:01:22.47 |
+37:31:07.4 |
HIP 63529 |
8.04 |
| 2026-02-21 12:00 |
13:01:06.47 |
+37:34:18.9 |
HIP 63529 |
10.55 |
| 2026-02-22 00:00 |
13:00:50.35 |
+37:37:29.5 |
HIP 63529 |
14.08 |
| 2026-02-22 12:00 |
13:00:34.09 |
+37:40:39.3 |
HIP 63389 |
16.44 |
| 2026-02-23 00:00 |
13:00:17.70 |
+37:43:48.2 |
HIP 63389 |
12.08 |
| 2026-02-23 12:00 |
13:00:01.19 |
+37:46:56.3 |
HIP 63389 |
7.90 |
| 2026-02-24 00:00 |
12:59:44.55 |
+37:50:03.4 |
HIP 63389 |
4.44 |