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 · 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) |
| 2026-05-12 00:00 |
15:43:20.75 |
-13:00:37.5 |
HIP 76982 |
4.02 |
| 2026-05-12 12:00 |
15:43:10.45 |
-13:00:12.7 |
HIP 76982 |
3.18 |
| 2026-05-13 00:00 |
15:43:00.15 |
-12:59:48.1 |
HIP 76982 |
4.13 |
| 2026-05-13 12:00 |
15:42:49.84 |
-12:59:23.4 |
HIP 76982 |
6.07 |
| 2026-05-14 00:00 |
15:42:39.52 |
-12:58:58.9 |
HIP 76982 |
8.35 |
| 2026-05-14 12:00 |
15:42:29.20 |
-12:58:34.5 |
HIP 76982 |
10.75 |
| 2026-05-15 00:00 |
15:42:18.88 |
-12:58:10.1 |
HIP 76982 |
13.20 |
| 2026-05-15 12:00 |
15:42:08.56 |
-12:57:45.9 |
HIP 76876 |
12.70 |
| 2026-05-16 00:00 |
15:41:58.23 |
-12:57:21.7 |
HIP 76876 |
11.82 |
| 2026-05-16 12:00 |
15:41:47.91 |
-12:56:57.6 |
HIP 76876 |
11.45 |
| 2026-05-17 00:00 |
15:41:37.59 |
-12:56:33.7 |
HIP 76876 |
11.64 |
| 2026-05-17 12:00 |
15:41:27.27 |
-12:56:09.8 |
HIP 76876 |
12.36 |
| 2026-05-18 00:00 |
15:41:16.95 |
-12:55:46.0 |
HIP 76876 |
13.53 |
| 2026-05-18 12:00 |
15:41:06.64 |
-12:55:22.4 |
HIP 76876 |
15.05 |
| 2026-05-19 00:00 |
15:40:56.32 |
-12:54:58.8 |
HIP 76876 |
16.82 |
| 2026-05-19 12:00 |
15:40:46.02 |
-12:54:35.4 |
HIP 76876 |
18.76 |
| 2026-05-20 00:00 |
15:40:35.72 |
-12:54:12.1 |
HIP 76876 |
20.84 |
| 2026-05-20 12:00 |
15:40:25.43 |
-12:53:48.9 |
HIP 76876 |
23.01 |
| 2026-05-21 00:00 |
15:40:15.14 |
-12:53:25.8 |
HIP 76622 |
21.59 |
| 2026-05-21 12:00 |
15:40:04.86 |
-12:53:02.8 |
HIP 76622 |
19.39 |
| 2026-05-22 00:00 |
15:39:54.60 |
-12:52:40.0 |
HIP 76622 |
17.27 |
| 2026-05-22 12:00 |
15:39:44.34 |
-12:52:17.3 |
HIP 76622 |
15.28 |
| 2026-05-23 00:00 |
15:39:34.09 |
-12:51:54.7 |
HIP 76622 |
13.48 |
| 2026-05-23 12:00 |
15:39:23.85 |
-12:51:32.3 |
HIP 76622 |
11.94 |
| 2026-05-24 00:00 |
15:39:13.63 |
-12:51:09.9 |
HIP 76622 |
10.77 |
| 2026-05-24 12:00 |
15:39:03.42 |
-12:50:47.8 |
HIP 76622 |
10.11 |
| 2026-05-25 00:00 |
15:38:53.22 |
-12:50:25.7 |
HIP 76622 |
10.05 |
| 2026-05-25 12:00 |
15:38:43.04 |
-12:50:03.8 |
HIP 76622 |
10.60 |
| 2026-05-26 00:00 |
15:38:32.87 |
-12:49:42.0 |
HIP 76622 |
11.67 |
| 2026-05-26 12:00 |
15:38:22.72 |
-12:49:20.4 |
HIP 76622 |
13.13 |
| 2026-05-27 00:00 |
15:38:12.58 |
-12:48:58.9 |
HIP 76622 |
14.87 |
| 2026-05-27 12:00 |
15:38:02.46 |
-12:48:37.6 |
HIP 76622 |
16.80 |
| 2026-05-28 00:00 |
15:37:52.36 |
-12:48:16.4 |
HIP 76622 |
18.85 |
| 2026-05-28 12:00 |
15:37:42.28 |
-12:47:55.4 |
HIP 76622 |
20.99 |
| 2026-05-29 00:00 |
15:37:32.21 |
-12:47:34.5 |
HIP 76622 |
23.20 |
| 2026-05-29 12:00 |
15:37:22.17 |
-12:47:13.8 |
HIP 76363 |
23.50 |
| 2026-05-30 00:00 |
15:37:12.15 |
-12:46:53.2 |
HIP 76363 |
21.17 |
| 2026-05-30 12:00 |
15:37:02.15 |
-12:46:32.8 |
HIP 76363 |
18.89 |
| 2026-05-31 00:00 |
15:36:52.17 |
-12:46:12.6 |
HIP 76363 |
16.66 |
| 2026-05-31 12:00 |
15:36:42.21 |
-12:45:52.5 |
HIP 76363 |
14.51 |
| 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 |