メタデータ
| 項目 |
値 |
| Designation |
C/2022 A3 (Lemmon-ATLAS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-09-28T20:10:26.535360Z |
| Orbit solution date (soln_date, UTC) |
2024-10-31T13:12:14Z |
| Obs used |
1015 |
| NEO |
- |
| M1 |
8.600 |
| K1 |
9.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2022-01-10T10:14:36.297600Z |
| Discovery magnitude (MPC) |
20.34 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) |
2023-02-25.0000000 |
| e |
0.99596960 |
| q (au) |
3.703462 |
| a (au) |
918.881737 |
| i (deg) |
88.348087 |
| Ω (om, deg) |
325.483203 |
| ω (w, deg) |
234.846313 |
| M (ma, deg) |
359.992363 |
等級
散乱 + 全体線形
$$
M_a = (9.660 + 4.723\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.660 |
| n |
4.723 |
| gf |
1.000 |
| gb |
-0.731 |
| k |
0.800 |
| 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 |
| 2021-04-30 |
2023-06-11 |
+0.7727 |
-0.638 |
| 2023-10-09 |
2024-10-29 |
-5.2480 |
+3.736 |
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 |
23:03:45.78 |
-36:06:46.6 |
HIP 113784 |
23.45 |
| 2026-06-01 12:00 |
23:03:43.91 |
-36:07:28.8 |
HIP 113784 |
22.67 |
| 2026-06-02 00:00 |
23:03:41.91 |
-36:08:11.7 |
HIP 113784 |
21.86 |
| 2026-06-02 12:00 |
23:03:39.77 |
-36:08:55.3 |
HIP 113784 |
21.02 |
| 2026-06-03 00:00 |
23:03:37.49 |
-36:09:39.5 |
HIP 113784 |
20.16 |
| 2026-06-03 12:00 |
23:03:35.08 |
-36:10:24.4 |
HIP 113784 |
19.27 |
| 2026-06-04 00:00 |
23:03:32.53 |
-36:11:10.0 |
HIP 113784 |
18.36 |
| 2026-06-04 12:00 |
23:03:29.85 |
-36:11:56.2 |
HIP 113784 |
17.42 |
| 2026-06-05 00:00 |
23:03:27.02 |
-36:12:43.1 |
HIP 113784 |
16.46 |
| 2026-06-05 12:00 |
23:03:24.06 |
-36:13:30.6 |
HIP 113784 |
15.47 |
| 2026-06-06 00:00 |
23:03:20.96 |
-36:14:18.7 |
HIP 113784 |
14.45 |
| 2026-06-06 12:00 |
23:03:17.72 |
-36:15:07.5 |
HIP 113784 |
13.41 |
| 2026-06-07 00:00 |
23:03:14.35 |
-36:15:56.9 |
HIP 113784 |
12.34 |
| 2026-06-07 12:00 |
23:03:10.83 |
-36:16:46.9 |
HIP 113784 |
11.25 |
| 2026-06-08 00:00 |
23:03:07.18 |
-36:17:37.6 |
HIP 113784 |
10.13 |
| 2026-06-08 12:00 |
23:03:03.38 |
-36:18:28.8 |
HIP 113784 |
8.98 |
| 2026-06-09 00:00 |
23:02:59.45 |
-36:19:20.6 |
HIP 113784 |
7.81 |
| 2026-06-09 12:00 |
23:02:55.37 |
-36:20:13.0 |
HIP 113784 |
6.61 |
| 2026-06-10 00:00 |
23:02:51.15 |
-36:21:06.0 |
HIP 113784 |
5.39 |
| 2026-06-10 12:00 |
23:02:46.80 |
-36:21:59.6 |
HIP 113784 |
4.14 |
| 2026-06-11 00:00 |
23:02:42.30 |
-36:22:53.7 |
HIP 113784 |
2.88 |
| 2026-06-11 12:00 |
23:02:37.66 |
-36:23:48.4 |
HIP 113784 |
1.61 |
| 2026-06-12 00:00 |
23:02:32.88 |
-36:24:43.6 |
HIP 113784 |
0.57 |
| 2026-06-12 12:00 |
23:02:27.95 |
-36:25:39.3 |
HIP 113784 |
1.30 |
| 2026-06-13 00:00 |
23:02:22.89 |
-36:26:35.6 |
HIP 113784 |
2.62 |
| 2026-06-13 12:00 |
23:02:17.68 |
-36:27:32.4 |
HIP 113784 |
4.02 |
| 2026-06-14 00:00 |
23:02:12.33 |
-36:28:29.7 |
HIP 113784 |
5.45 |
| 2026-06-14 12:00 |
23:02:06.83 |
-36:29:27.6 |
HIP 113784 |
6.91 |
| 2026-06-15 00:00 |
23:02:01.20 |
-36:30:25.9 |
HIP 113784 |
8.40 |
| 2026-06-15 12:00 |
23:01:55.42 |
-36:31:24.6 |
HIP 113784 |
9.92 |
| 2026-06-16 00:00 |
23:01:49.50 |
-36:32:23.9 |
HIP 113784 |
11.46 |
| 2026-06-16 12:00 |
23:01:43.43 |
-36:33:23.6 |
HIP 113784 |
13.04 |
| 2026-06-17 00:00 |
23:01:37.23 |
-36:34:23.8 |
HIP 113784 |
14.64 |
| 2026-06-17 12:00 |
23:01:30.87 |
-36:35:24.4 |
HIP 113784 |
16.26 |
| 2026-06-18 00:00 |
23:01:24.38 |
-36:36:25.4 |
HIP 113784 |
17.91 |
| 2026-06-18 12:00 |
23:01:17.75 |
-36:37:26.9 |
HIP 113784 |
19.59 |
| 2026-06-19 00:00 |
23:01:10.97 |
-36:38:28.7 |
HIP 113784 |
21.30 |
| 2026-06-19 12:00 |
23:01:04.05 |
-36:39:30.9 |
HIP 113784 |
23.03 |
| 2026-06-20 00:00 |
23:00:56.98 |
-36:40:33.6 |
HIP 113784 |
24.79 |
| 2026-06-20 12:00 |
23:00:49.78 |
-36:41:36.6 |
HIP 113784 |
26.58 |
| 2026-06-21 00:00 |
23:00:42.43 |
-36:42:39.9 |
HIP 113784 |
28.39 |
| 2026-06-21 12:00 |
23:00:34.94 |
-36:43:43.7 |
HIP 113784 |
30.22 |
| 2026-06-22 00:00 |
23:00:27.31 |
-36:44:47.7 |
HIP 113784 |
32.09 |