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 · University of Arizona 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 |
2023-11-18 |
-4.1066 |
+1.202 |
| 2023-11-18 |
2024-01-09 |
+21.3814 |
-2.097 |
| 2024-02-11 |
2024-03-09 |
+21.5517 |
-3.253 |
| 2024-03-09 |
2024-06-02 |
+1.1889 |
-1.105 |
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) |
| 2026-06-01 00:00 |
12:05:12.32 |
+40:10:13.9 |
HIP 58957 |
1.74 |
| 2026-06-01 12:00 |
12:05:05.29 |
+40:08:49.2 |
HIP 58957 |
3.07 |
| 2026-06-02 00:00 |
12:04:58.40 |
+40:07:23.9 |
HIP 58957 |
4.82 |
| 2026-06-02 12:00 |
12:04:51.67 |
+40:05:57.9 |
HIP 58957 |
6.65 |
| 2026-06-03 00:00 |
12:04:45.08 |
+40:04:31.3 |
HIP 58957 |
8.51 |
| 2026-06-03 12:00 |
12:04:38.63 |
+40:03:04.0 |
HIP 58957 |
10.38 |
| 2026-06-04 00:00 |
12:04:32.34 |
+40:01:36.0 |
HIP 58957 |
12.25 |
| 2026-06-04 12:00 |
12:04:26.18 |
+40:00:07.4 |
HIP 58957 |
14.11 |
| 2026-06-05 00:00 |
12:04:20.18 |
+39:58:38.2 |
HIP 58957 |
15.96 |
| 2026-06-05 12:00 |
12:04:14.32 |
+39:57:08.4 |
HIP 58957 |
17.81 |
| 2026-06-06 00:00 |
12:04:08.60 |
+39:55:38.0 |
HIP 58957 |
19.65 |
| 2026-06-06 12:00 |
12:04:03.03 |
+39:54:07.0 |
HIP 58957 |
21.48 |
| 2026-06-07 00:00 |
12:03:57.61 |
+39:52:35.4 |
HIP 58957 |
23.31 |
| 2026-06-07 12:00 |
12:03:52.32 |
+39:51:03.2 |
HIP 58775 |
21.86 |
| 2026-06-08 00:00 |
12:03:47.19 |
+39:49:30.5 |
HIP 58775 |
20.09 |
| 2026-06-08 12:00 |
12:03:42.19 |
+39:47:57.2 |
HIP 58775 |
18.33 |
| 2026-06-09 00:00 |
12:03:37.34 |
+39:46:23.4 |
HIP 58775 |
16.58 |
| 2026-06-09 12:00 |
12:03:32.63 |
+39:44:49.0 |
HIP 58775 |
14.85 |
| 2026-06-10 00:00 |
12:03:28.07 |
+39:43:14.1 |
HIP 58775 |
13.13 |
| 2026-06-10 12:00 |
12:03:23.65 |
+39:41:38.8 |
HIP 58775 |
11.44 |
| 2026-06-11 00:00 |
12:03:19.37 |
+39:40:02.9 |
HIP 58775 |
9.78 |
| 2026-06-11 12:00 |
12:03:15.23 |
+39:38:26.5 |
HIP 58775 |
8.17 |
| 2026-06-12 00:00 |
12:03:11.23 |
+39:36:49.6 |
HIP 58775 |
6.64 |
| 2026-06-12 12:00 |
12:03:07.38 |
+39:35:12.3 |
HIP 58775 |
5.26 |
| 2026-06-13 00:00 |
12:03:03.66 |
+39:33:34.5 |
HIP 58775 |
4.17 |
| 2026-06-13 12:00 |
12:03:00.08 |
+39:31:56.3 |
HIP 58775 |
3.65 |
| 2026-06-14 00:00 |
12:02:56.65 |
+39:30:17.6 |
HIP 58775 |
3.91 |
| 2026-06-14 12:00 |
12:02:53.35 |
+39:28:38.5 |
HIP 58775 |
4.83 |
| 2026-06-15 00:00 |
12:02:50.20 |
+39:26:59.0 |
HIP 58775 |
6.12 |
| 2026-06-15 12:00 |
12:02:47.18 |
+39:25:19.0 |
HIP 58775 |
7.59 |
| 2026-06-16 00:00 |
12:02:44.30 |
+39:23:38.7 |
HIP 58775 |
9.15 |
| 2026-06-16 12:00 |
12:02:41.56 |
+39:21:58.0 |
HIP 58775 |
10.76 |
| 2026-06-17 00:00 |
12:02:38.95 |
+39:20:16.9 |
HIP 58775 |
12.40 |
| 2026-06-17 12:00 |
12:02:36.48 |
+39:18:35.4 |
HIP 58775 |
14.06 |
| 2026-06-18 00:00 |
12:02:34.15 |
+39:16:53.6 |
HIP 58775 |
15.73 |
| 2026-06-18 12:00 |
12:02:31.95 |
+39:15:11.5 |
HIP 58775 |
17.41 |
| 2026-06-19 00:00 |
12:02:29.89 |
+39:13:29.0 |
HIP 58775 |
19.10 |
| 2026-06-19 12:00 |
12:02:27.96 |
+39:11:46.2 |
HIP 58775 |
20.79 |
| 2026-06-20 00:00 |
12:02:26.16 |
+39:10:03.1 |
HIP 58775 |
22.49 |
| 2026-06-20 12:00 |
12:02:24.50 |
+39:08:19.6 |
HIP 58775 |
24.18 |
| 2026-06-21 00:00 |
12:02:22.96 |
+39:06:35.9 |
HIP 58775 |
25.88 |
| 2026-06-21 12:00 |
12:02:21.56 |
+39:04:51.9 |
HIP 58775 |
27.58 |
| 2026-06-22 00:00 |
12:02:20.29 |
+39:03:07.7 |
HIP 58775 |
29.28 |