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) |
| 2026-07-29 00:00 |
15:22:26.27 |
-12:32:12.6 |
HIP 75334 |
21.94 |
| 2026-07-29 12:00 |
15:22:22.50 |
-12:32:20.5 |
HIP 75334 |
22.72 |
| 2026-07-30 00:00 |
15:22:18.80 |
-12:32:28.6 |
HIP 75334 |
23.50 |
| 2026-07-30 12:00 |
15:22:15.17 |
-12:32:36.9 |
HIP 75334 |
24.29 |
| 2026-07-31 00:00 |
15:22:11.61 |
-12:32:45.5 |
HIP 75334 |
25.06 |
| 2026-07-31 12:00 |
15:22:08.11 |
-12:32:54.4 |
HIP 75334 |
25.84 |
| 2026-08-01 00:00 |
15:22:04.68 |
-12:33:03.5 |
HIP 75334 |
26.61 |
| 2026-08-01 12:00 |
15:22:01.32 |
-12:33:12.9 |
HIP 75334 |
27.37 |
| 2026-08-02 00:00 |
15:21:58.03 |
-12:33:22.5 |
HIP 75334 |
28.13 |
| 2026-08-02 12:00 |
15:21:54.81 |
-12:33:32.4 |
HIP 75154 |
28.63 |
| 2026-08-03 00:00 |
15:21:51.65 |
-12:33:42.5 |
HIP 75154 |
28.65 |
| 2026-08-03 12:00 |
15:21:48.56 |
-12:33:52.9 |
HIP 75154 |
28.71 |
| 2026-08-04 00:00 |
15:21:45.54 |
-12:34:03.5 |
HIP 75154 |
28.79 |
| 2026-08-04 12:00 |
15:21:42.59 |
-12:34:14.3 |
HIP 75154 |
28.89 |
| 2026-08-05 00:00 |
15:21:39.71 |
-12:34:25.4 |
HIP 75154 |
29.02 |
| 2026-08-05 12:00 |
15:21:36.89 |
-12:34:36.8 |
HIP 75154 |
29.17 |
| 2026-08-06 00:00 |
15:21:34.14 |
-12:34:48.3 |
HIP 75064 |
29.28 |
| 2026-08-06 12:00 |
15:21:31.46 |
-12:35:00.2 |
HIP 75064 |
29.05 |
| 2026-08-07 00:00 |
15:21:28.85 |
-12:35:12.3 |
HIP 75064 |
28.85 |
| 2026-08-07 12:00 |
15:21:26.31 |
-12:35:24.6 |
HIP 75064 |
28.68 |
| 2026-08-08 00:00 |
15:21:23.83 |
-12:35:37.1 |
HIP 75064 |
28.53 |
| 2026-08-08 12:00 |
15:21:21.42 |
-12:35:49.9 |
HIP 75064 |
28.40 |
| 2026-08-09 00:00 |
15:21:19.08 |
-12:36:03.0 |
HIP 75064 |
28.31 |
| 2026-08-09 12:00 |
15:21:16.81 |
-12:36:16.3 |
HIP 75064 |
28.23 |
| 2026-08-10 00:00 |
15:21:14.61 |
-12:36:29.8 |
HIP 75064 |
28.18 |
| 2026-08-10 12:00 |
15:21:12.47 |
-12:36:43.5 |
HIP 75064 |
28.15 |
| 2026-08-11 00:00 |
15:21:10.40 |
-12:36:57.5 |
HIP 75064 |
28.15 |
| 2026-08-11 12:00 |
15:21:08.40 |
-12:37:11.8 |
HIP 75064 |
28.16 |
| 2026-08-12 00:00 |
15:21:06.47 |
-12:37:26.2 |
HIP 75064 |
28.20 |
| 2026-08-12 12:00 |
15:21:04.60 |
-12:37:40.9 |
HIP 75064 |
28.25 |
| 2026-08-13 00:00 |
15:21:02.81 |
-12:37:55.9 |
HIP 75064 |
28.33 |
| 2026-08-13 12:00 |
15:21:01.08 |
-12:38:11.0 |
HIP 75064 |
28.42 |
| 2026-08-14 00:00 |
15:20:59.41 |
-12:38:26.4 |
HIP 75064 |
28.53 |
| 2026-08-14 12:00 |
15:20:57.82 |
-12:38:42.0 |
HIP 75064 |
28.66 |
| 2026-08-15 00:00 |
15:20:56.29 |
-12:38:57.9 |
HIP 75064 |
28.80 |
| 2026-08-15 12:00 |
15:20:54.83 |
-12:39:13.9 |
HIP 75064 |
28.95 |
| 2026-08-16 00:00 |
15:20:53.43 |
-12:39:30.2 |
HIP 75064 |
29.12 |
| 2026-08-16 12:00 |
15:20:52.11 |
-12:39:46.7 |
HIP 75064 |
29.30 |
| 2026-08-17 00:00 |
15:20:50.84 |
-12:40:03.5 |
HIP 75064 |
29.50 |
| 2026-08-17 12:00 |
15:20:49.65 |
-12:40:20.4 |
HIP 75064 |
29.71 |
| 2026-08-18 00:00 |
15:20:48.52 |
-12:40:37.6 |
HIP 75064 |
29.92 |
| 2026-08-18 12:00 |
15:20:47.46 |
-12:40:55.0 |
HIP 75116 |
29.93 |
| 2026-08-19 00:00 |
15:20:46.46 |
-12:41:12.6 |
HIP 75116 |
29.66 |