메타데이터
| 항목 |
값 |
| Designation |
C/2020 T5 (Lemmon) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-10-09T14:55:40.877760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:15Z |
| Obs used |
111 |
| NEO |
- |
| M1 |
16.200 |
| K1 |
10.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-10-05T02:23:25.872000Z |
| Discovery magnitude (MPC) |
20.59 G |
| Discovery observatory (MPC) |
G96 · University of Arizona Mt. Lemmon Survey |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2020-10-12.0000000 |
| e |
0.99797054 |
| q (au) |
1.889011 |
| a (au) |
930.795662 |
| i (deg) |
66.603879 |
| Ω (om, deg) |
237.861698 |
| ω (w, deg) |
90.292383 |
| M (ma, deg) |
0.000083 |
밝기
산란 + 전체 선형
$$
M_a = (15.381 + 4.112\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.381 |
| n |
4.112 |
| gf |
1.000 |
| gb |
-0.794 |
| k |
1.000 |
| 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 |
05:36:33.11 |
-19:21:04.5 |
HIP 26376 |
31.09 |
| 2026-06-01 12:00 |
05:36:40.79 |
-19:20:55.2 |
HIP 26376 |
30.92 |
| 2026-06-02 00:00 |
05:36:48.48 |
-19:20:46.5 |
HIP 26376 |
30.85 |
| 2026-06-02 12:00 |
05:36:56.18 |
-19:20:38.3 |
HIP 26376 |
30.88 |
| 2026-06-03 00:00 |
05:37:03.89 |
-19:20:30.7 |
HIP 26376 |
31.00 |
| 2026-06-03 12:00 |
05:37:11.62 |
-19:20:23.7 |
HIP 26376 |
31.22 |
| 2026-06-04 00:00 |
05:37:19.35 |
-19:20:17.2 |
HIP 26376 |
31.54 |
| 2026-06-04 12:00 |
05:37:27.09 |
-19:20:11.2 |
HIP 26376 |
31.95 |
| 2026-06-05 00:00 |
05:37:34.84 |
-19:20:05.8 |
HIP 26376 |
32.45 |
| 2026-06-05 12:00 |
05:37:42.60 |
-19:20:01.0 |
HIP 26376 |
33.03 |
| 2026-06-06 00:00 |
05:37:50.36 |
-19:19:56.7 |
HIP 26376 |
33.70 |
| 2026-06-06 12:00 |
05:37:58.14 |
-19:19:53.0 |
HIP 26688 |
33.48 |
| 2026-06-07 00:00 |
05:38:05.92 |
-19:19:49.9 |
HIP 26688 |
31.67 |
| 2026-06-07 12:00 |
05:38:13.71 |
-19:19:47.3 |
HIP 26688 |
29.86 |
| 2026-06-08 00:00 |
05:38:21.50 |
-19:19:45.3 |
HIP 26688 |
28.06 |
| 2026-06-08 12:00 |
05:38:29.30 |
-19:19:43.9 |
HIP 26688 |
26.26 |
| 2026-06-09 00:00 |
05:38:37.10 |
-19:19:43.0 |
HIP 26688 |
24.47 |
| 2026-06-09 12:00 |
05:38:44.91 |
-19:19:42.7 |
HIP 26688 |
22.69 |
| 2026-06-10 00:00 |
05:38:52.73 |
-19:19:42.9 |
HIP 26688 |
20.92 |
| 2026-06-10 12:00 |
05:39:00.55 |
-19:19:43.8 |
HIP 26688 |
19.17 |
| 2026-06-11 00:00 |
05:39:08.37 |
-19:19:45.2 |
HIP 26688 |
17.44 |
| 2026-06-11 12:00 |
05:39:16.20 |
-19:19:47.1 |
HIP 26688 |
15.74 |
| 2026-06-12 00:00 |
05:39:24.02 |
-19:19:49.7 |
HIP 26688 |
14.07 |
| 2026-06-12 12:00 |
05:39:31.86 |
-19:19:52.8 |
HIP 26688 |
12.47 |
| 2026-06-13 00:00 |
05:39:39.69 |
-19:19:56.4 |
HIP 26688 |
10.95 |
| 2026-06-13 12:00 |
05:39:47.52 |
-19:20:00.7 |
HIP 26688 |
9.55 |
| 2026-06-14 00:00 |
05:39:55.36 |
-19:20:05.5 |
HIP 26688 |
8.33 |
| 2026-06-14 12:00 |
05:40:03.20 |
-19:20:10.9 |
HIP 26688 |
7.40 |
| 2026-06-15 00:00 |
05:40:11.03 |
-19:20:16.9 |
HIP 26688 |
6.85 |
| 2026-06-15 12:00 |
05:40:18.87 |
-19:20:23.4 |
HIP 26688 |
6.80 |
| 2026-06-16 00:00 |
05:40:26.70 |
-19:20:30.5 |
HIP 26688 |
7.24 |
| 2026-06-16 12:00 |
05:40:34.54 |
-19:20:38.2 |
HIP 26688 |
8.10 |
| 2026-06-17 00:00 |
05:40:42.37 |
-19:20:46.5 |
HIP 26688 |
9.27 |
| 2026-06-17 12:00 |
05:40:50.20 |
-19:20:55.3 |
HIP 26688 |
10.63 |
| 2026-06-18 00:00 |
05:40:58.02 |
-19:21:04.7 |
HIP 26688 |
12.14 |
| 2026-06-18 12:00 |
05:41:05.85 |
-19:21:14.7 |
HIP 26688 |
13.73 |
| 2026-06-19 00:00 |
05:41:13.67 |
-19:21:25.3 |
HIP 26688 |
15.39 |
| 2026-06-19 12:00 |
05:41:21.48 |
-19:21:36.4 |
HIP 26688 |
17.09 |
| 2026-06-20 00:00 |
05:41:29.29 |
-19:21:48.1 |
HIP 26688 |
18.82 |
| 2026-06-20 12:00 |
05:41:37.10 |
-19:22:00.3 |
HIP 26688 |
20.57 |
| 2026-06-21 00:00 |
05:41:44.90 |
-19:22:13.2 |
HIP 26688 |
22.35 |
| 2026-06-21 12:00 |
05:41:52.70 |
-19:22:26.6 |
HIP 26846 |
23.53 |
| 2026-06-22 00:00 |
05:42:00.49 |
-19:22:40.5 |
HIP 26846 |
23.69 |