메타데이터
| 항목 |
값 |
| Designation |
C/2021 F1 (Lemmon-PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-04-06T21:01:27.013440Z |
| Orbit solution date (soln_date, UTC) |
2023-04-24T19:06:41Z |
| Obs used |
403 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
10.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2022-03-03.0000000 |
| e |
0.99570134 |
| q (au) |
0.995447 |
| a (au) |
231.571420 |
| i (deg) |
107.324992 |
| Ω (om, deg) |
203.451604 |
| ω (w, deg) |
146.826095 |
| M (ma, deg) |
359.990246 |
밝기
산란 + 전체 선형
$$
M_a = (13.444 + 4.948\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
13.444 |
| n |
4.948 |
| gf |
0.997 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
10.000 |
| 파라미터 |
기호 |
범위 |
설명 |
| 태양·지구거리 1 AU에서의 절대등급 |
H0 |
-5 to 20 |
혜성의 고유 밝기 |
| 광도 기울기 파라미터 |
n |
2 to 6 |
태양거리 변화에 따른 밝기 변화율 |
| 전방 산란 비대칭 계수 |
gf |
0.8 to 1 |
전방 산란의 강도 |
| 후방 산란 비대칭 계수 |
gb |
-1 to -0.5 |
후방 산란의 강도 |
| 분할 계수 |
k |
0.8 to 1 |
전·후방 산란 기여도 비율 |
| 먼지/가스 밝기 비 |
δ90 |
1 to 10 |
코마에서 먼지 산란 대비 가스 방출의 상대 기여 |
참고: EPSC-DPS2025-160
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2022-01-07 |
2022-03-31 |
+7.4996 |
-2.051 |
| 2022-05-30 |
2022-09-02 |
+5.5948 |
-3.888 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
11:41:02.49 |
-73:54:46.9 |
HIP 56847 |
9.37 |
| 2026-06-01 12:00 |
11:40:57.23 |
-73:52:24.7 |
HIP 56847 |
7.74 |
| 2026-06-02 00:00 |
11:40:52.24 |
-73:50:02.3 |
HIP 56847 |
6.63 |
| 2026-06-02 12:00 |
11:40:47.51 |
-73:47:39.9 |
HIP 56847 |
6.29 |
| 2026-06-03 00:00 |
11:40:43.05 |
-73:45:17.5 |
HIP 56847 |
6.84 |
| 2026-06-03 12:00 |
11:40:38.86 |
-73:42:55.0 |
HIP 56847 |
8.11 |
| 2026-06-04 00:00 |
11:40:34.93 |
-73:40:32.5 |
HIP 56847 |
9.82 |
| 2026-06-04 12:00 |
11:40:31.26 |
-73:38:09.9 |
HIP 56847 |
11.77 |
| 2026-06-05 00:00 |
11:40:27.85 |
-73:35:47.3 |
HIP 56847 |
13.87 |
| 2026-06-05 12:00 |
11:40:24.70 |
-73:33:24.7 |
HIP 56847 |
16.06 |
| 2026-06-06 00:00 |
11:40:21.81 |
-73:31:02.2 |
HIP 56847 |
18.30 |
| 2026-06-06 12:00 |
11:40:19.17 |
-73:28:39.6 |
HIP 56625 |
17.40 |
| 2026-06-07 00:00 |
11:40:16.79 |
-73:26:17.1 |
HIP 56625 |
16.38 |
| 2026-06-07 12:00 |
11:40:14.65 |
-73:23:54.6 |
HIP 56625 |
15.68 |
| 2026-06-08 00:00 |
11:40:12.77 |
-73:21:32.2 |
HIP 56625 |
15.33 |
| 2026-06-08 12:00 |
11:40:11.13 |
-73:19:09.8 |
HIP 56625 |
15.37 |
| 2026-06-09 00:00 |
11:40:09.75 |
-73:16:47.5 |
HIP 56625 |
15.78 |
| 2026-06-09 12:00 |
11:40:08.60 |
-73:14:25.3 |
HIP 56625 |
16.54 |
| 2026-06-10 00:00 |
11:40:07.70 |
-73:12:03.1 |
HIP 56625 |
17.61 |
| 2026-06-10 12:00 |
11:40:07.05 |
-73:09:41.1 |
HIP 56625 |
18.92 |
| 2026-06-11 00:00 |
11:40:06.63 |
-73:07:19.2 |
HIP 56625 |
20.44 |
| 2026-06-11 12:00 |
11:40:06.46 |
-73:04:57.4 |
HIP 57296 |
21.16 |
| 2026-06-12 00:00 |
11:40:06.52 |
-73:02:35.7 |
HIP 57296 |
21.76 |
| 2026-06-12 12:00 |
11:40:06.81 |
-73:00:14.2 |
HIP 56558 |
21.51 |
| 2026-06-13 00:00 |
11:40:07.34 |
-72:57:52.8 |
HIP 56558 |
20.61 |
| 2026-06-13 12:00 |
11:40:08.11 |
-72:55:31.6 |
HIP 56558 |
19.97 |
| 2026-06-14 00:00 |
11:40:09.10 |
-72:53:10.6 |
HIP 56558 |
19.61 |
| 2026-06-14 12:00 |
11:40:10.32 |
-72:50:49.7 |
HIP 56558 |
19.54 |
| 2026-06-15 00:00 |
11:40:11.78 |
-72:48:29.1 |
HIP 56558 |
19.77 |
| 2026-06-15 12:00 |
11:40:13.45 |
-72:46:08.7 |
HIP 56558 |
20.29 |
| 2026-06-16 00:00 |
11:40:15.35 |
-72:43:48.4 |
HIP 56558 |
21.07 |
| 2026-06-16 12:00 |
11:40:17.48 |
-72:41:28.5 |
HIP 57143 |
19.49 |
| 2026-06-17 00:00 |
11:40:19.82 |
-72:39:08.7 |
HIP 57143 |
17.68 |
| 2026-06-17 12:00 |
11:40:22.38 |
-72:36:49.2 |
HIP 57143 |
15.99 |
| 2026-06-18 00:00 |
11:40:25.16 |
-72:34:29.9 |
HIP 57143 |
14.47 |
| 2026-06-18 12:00 |
11:40:28.16 |
-72:32:11.0 |
HIP 56797 |
13.05 |
| 2026-06-19 00:00 |
11:40:31.37 |
-72:29:52.3 |
HIP 56797 |
11.55 |
| 2026-06-19 12:00 |
11:40:34.78 |
-72:27:33.8 |
HIP 56797 |
10.37 |
| 2026-06-20 00:00 |
11:40:38.41 |
-72:25:15.7 |
HIP 56797 |
9.64 |
| 2026-06-20 12:00 |
11:40:42.25 |
-72:22:57.9 |
HIP 56797 |
9.45 |
| 2026-06-21 00:00 |
11:40:46.29 |
-72:20:40.4 |
HIP 56797 |
9.83 |
| 2026-06-21 12:00 |
11:40:50.54 |
-72:18:23.2 |
HIP 56797 |
10.73 |
| 2026-06-22 00:00 |
11:40:54.98 |
-72:16:06.3 |
HIP 56797 |
12.02 |