메타데이터
| 항목 |
값 |
| Designation |
C/2019 Q1 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-07-19T15:31:26.172480Z |
| Orbit solution date (soln_date, UTC) |
2024-03-12T13:12:25Z |
| Obs used |
248 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-08-28T09:37:41.952000Z |
| Discovery magnitude (MPC) |
20.60 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-04-08.0000000 |
| e |
1.00092868 |
| q (au) |
4.997085 |
| a (au) |
-5380.822928 |
| i (deg) |
155.721870 |
| Ω (om, deg) |
42.338664 |
| ω (w, deg) |
55.917769 |
| M (ma, deg) |
-0.000256 |
밝기
산란 + 전체 선형
$$
M_a = (17.131 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
17.131 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.790 |
| 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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
15:36:32.27 |
-12:45:32.6 |
HIP 76363 |
12.47 |
| 2026-06-01 12:00 |
15:36:22.36 |
-12:45:12.8 |
HIP 76363 |
10.62 |
| 2026-06-02 00:00 |
15:36:12.48 |
-12:44:53.3 |
HIP 76363 |
9.04 |
| 2026-06-02 12:00 |
15:36:02.62 |
-12:44:33.8 |
HIP 76363 |
7.91 |
| 2026-06-03 00:00 |
15:35:52.78 |
-12:44:14.6 |
HIP 76363 |
7.42 |
| 2026-06-03 12:00 |
15:35:42.98 |
-12:43:55.5 |
HIP 76363 |
7.70 |
| 2026-06-04 00:00 |
15:35:33.19 |
-12:43:36.7 |
HIP 76363 |
8.66 |
| 2026-06-04 12:00 |
15:35:23.44 |
-12:43:17.9 |
HIP 76363 |
10.11 |
| 2026-06-05 00:00 |
15:35:13.72 |
-12:42:59.4 |
HIP 76363 |
11.86 |
| 2026-06-05 12:00 |
15:35:04.02 |
-12:42:41.1 |
HIP 76314 |
12.78 |
| 2026-06-06 00:00 |
15:34:54.36 |
-12:42:22.9 |
HIP 76314 |
13.37 |
| 2026-06-06 12:00 |
15:34:44.72 |
-12:42:04.9 |
HIP 76314 |
14.33 |
| 2026-06-07 00:00 |
15:34:35.12 |
-12:41:47.1 |
HIP 76314 |
15.60 |
| 2026-06-07 12:00 |
15:34:25.55 |
-12:41:29.5 |
HIP 76314 |
17.09 |
| 2026-06-08 00:00 |
15:34:16.01 |
-12:41:12.1 |
HIP 76314 |
18.76 |
| 2026-06-08 12:00 |
15:34:06.50 |
-12:40:54.9 |
HIP 76314 |
20.55 |
| 2026-06-09 00:00 |
15:33:57.03 |
-12:40:37.9 |
HIP 76314 |
22.44 |
| 2026-06-09 12:00 |
15:33:47.59 |
-12:40:21.1 |
HIP 76153 |
21.89 |
| 2026-06-10 00:00 |
15:33:38.19 |
-12:40:04.4 |
HIP 76153 |
21.44 |
| 2026-06-10 12:00 |
15:33:28.82 |
-12:39:48.0 |
HIP 76153 |
21.23 |
| 2026-06-11 00:00 |
15:33:19.49 |
-12:39:31.8 |
HIP 76153 |
21.26 |
| 2026-06-11 12:00 |
15:33:10.19 |
-12:39:15.8 |
HIP 76153 |
21.54 |
| 2026-06-12 00:00 |
15:33:00.93 |
-12:39:00.0 |
HIP 76153 |
22.04 |
| 2026-06-12 12:00 |
15:32:51.71 |
-12:38:44.4 |
HIP 76153 |
22.76 |
| 2026-06-13 00:00 |
15:32:42.53 |
-12:38:29.0 |
HIP 76153 |
23.66 |
| 2026-06-13 12:00 |
15:32:33.39 |
-12:38:13.8 |
HIP 76153 |
24.73 |
| 2026-06-14 00:00 |
15:32:24.29 |
-12:37:58.9 |
HIP 76153 |
25.95 |
| 2026-06-14 12:00 |
15:32:15.23 |
-12:37:44.1 |
HIP 75935 |
25.31 |
| 2026-06-15 00:00 |
15:32:06.22 |
-12:37:29.6 |
HIP 75935 |
23.27 |
| 2026-06-15 12:00 |
15:31:57.24 |
-12:37:15.3 |
HIP 75935 |
21.27 |
| 2026-06-16 00:00 |
15:31:48.31 |
-12:37:01.2 |
HIP 75935 |
19.32 |
| 2026-06-16 12:00 |
15:31:39.42 |
-12:36:47.4 |
HIP 75935 |
17.44 |
| 2026-06-17 00:00 |
15:31:30.57 |
-12:36:33.7 |
HIP 75935 |
15.64 |
| 2026-06-17 12:00 |
15:31:21.77 |
-12:36:20.3 |
HIP 75935 |
13.96 |
| 2026-06-18 00:00 |
15:31:13.01 |
-12:36:07.1 |
HIP 75935 |
12.43 |
| 2026-06-18 12:00 |
15:31:04.30 |
-12:35:54.2 |
HIP 75935 |
11.10 |
| 2026-06-19 00:00 |
15:30:55.64 |
-12:35:41.4 |
HIP 75935 |
10.07 |
| 2026-06-19 12:00 |
15:30:47.02 |
-12:35:28.9 |
HIP 75935 |
9.40 |
| 2026-06-20 00:00 |
15:30:38.45 |
-12:35:16.7 |
HIP 75935 |
9.19 |
| 2026-06-20 12:00 |
15:30:29.92 |
-12:35:04.6 |
HIP 75935 |
9.44 |
| 2026-06-21 00:00 |
15:30:21.45 |
-12:34:52.9 |
HIP 75935 |
10.12 |
| 2026-06-21 12:00 |
15:30:13.02 |
-12:34:41.3 |
HIP 75935 |
11.14 |
| 2026-06-22 00:00 |
15:30:04.65 |
-12:34:30.0 |
HIP 75885 |
12.15 |