메타데이터
| 항목 |
값 |
| Designation |
C/2019 K6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-05-20T00:32:38.981760Z |
| Orbit solution date (soln_date, UTC) |
2022-01-05T13:06:41Z |
| Obs used |
360 |
| NEO |
- |
| M1 |
9.600 |
| K1 |
11.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2019-05-31T13:20:54.816000Z |
| Discovery magnitude (MPC) |
21.10 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-08-12.0000000 |
| e |
0.99756459 |
| q (au) |
3.928974 |
| a (au) |
1613.267974 |
| i (deg) |
132.394317 |
| Ω (om, deg) |
42.926027 |
| ω (w, deg) |
187.578586 |
| M (ma, deg) |
359.995710 |
밝기
산란 + 전체 선형
$$
M_a = (6.462 + 5.788\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.462 |
| n |
5.788 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 2019-05-07 |
2020-05-14 |
+1.2378 |
-0.912 |
| 2020-05-21 |
2021-03-13 |
+7.1303 |
-3.375 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
05:47:59.72 |
-10:33:01.3 |
HIP 27341 |
8.13 |
| 2026-07-29 12:00 |
05:48:04.11 |
-10:33:28.2 |
HIP 27341 |
9.27 |
| 2026-07-30 00:00 |
05:48:08.45 |
-10:33:55.4 |
HIP 27341 |
10.40 |
| 2026-07-30 12:00 |
05:48:12.77 |
-10:34:23.1 |
HIP 27341 |
11.53 |
| 2026-07-31 00:00 |
05:48:17.04 |
-10:34:51.1 |
HIP 27341 |
12.65 |
| 2026-07-31 12:00 |
05:48:21.28 |
-10:35:19.5 |
HIP 27341 |
13.78 |
| 2026-08-01 00:00 |
05:48:25.48 |
-10:35:48.4 |
HIP 27341 |
14.90 |
| 2026-08-01 12:00 |
05:48:29.64 |
-10:36:17.6 |
HIP 27341 |
16.01 |
| 2026-08-02 00:00 |
05:48:33.76 |
-10:36:47.2 |
HIP 27341 |
17.12 |
| 2026-08-02 12:00 |
05:48:37.84 |
-10:37:17.2 |
HIP 27341 |
18.23 |
| 2026-08-03 00:00 |
05:48:41.89 |
-10:37:47.6 |
HIP 27341 |
19.32 |
| 2026-08-03 12:00 |
05:48:45.89 |
-10:38:18.3 |
HIP 27341 |
20.42 |
| 2026-08-04 00:00 |
05:48:49.85 |
-10:38:49.5 |
HIP 27341 |
21.51 |
| 2026-08-04 12:00 |
05:48:53.78 |
-10:39:21.0 |
HIP 27341 |
22.59 |
| 2026-08-05 00:00 |
05:48:57.66 |
-10:39:52.9 |
HIP 27341 |
23.66 |
| 2026-08-05 12:00 |
05:49:01.50 |
-10:40:25.2 |
HIP 27477 |
24.58 |
| 2026-08-06 00:00 |
05:49:05.30 |
-10:40:57.8 |
HIP 27477 |
24.01 |
| 2026-08-06 12:00 |
05:49:09.06 |
-10:41:30.9 |
HIP 27477 |
23.46 |
| 2026-08-07 00:00 |
05:49:12.77 |
-10:42:04.2 |
HIP 27477 |
22.95 |
| 2026-08-07 12:00 |
05:49:16.45 |
-10:42:38.0 |
HIP 27477 |
22.46 |
| 2026-08-08 00:00 |
05:49:20.08 |
-10:43:12.1 |
HIP 27477 |
22.01 |
| 2026-08-08 12:00 |
05:49:23.66 |
-10:43:46.6 |
HIP 27477 |
21.60 |
| 2026-08-09 00:00 |
05:49:27.20 |
-10:44:21.5 |
HIP 27477 |
21.21 |
| 2026-08-09 12:00 |
05:49:30.70 |
-10:44:56.7 |
HIP 27477 |
20.87 |
| 2026-08-10 00:00 |
05:49:34.16 |
-10:45:32.2 |
HIP 27477 |
20.56 |
| 2026-08-10 12:00 |
05:49:37.56 |
-10:46:08.1 |
HIP 27477 |
20.30 |
| 2026-08-11 00:00 |
05:49:40.93 |
-10:46:44.4 |
HIP 27477 |
20.07 |
| 2026-08-11 12:00 |
05:49:44.24 |
-10:47:21.0 |
HIP 27477 |
19.88 |
| 2026-08-12 00:00 |
05:49:47.51 |
-10:47:58.0 |
HIP 27477 |
19.73 |
| 2026-08-12 12:00 |
05:49:50.74 |
-10:48:35.2 |
HIP 27477 |
19.62 |
| 2026-08-13 00:00 |
05:49:53.92 |
-10:49:12.9 |
HIP 27477 |
19.55 |
| 2026-08-13 12:00 |
05:49:57.05 |
-10:49:50.8 |
HIP 27477 |
19.52 |
| 2026-08-14 00:00 |
05:50:00.13 |
-10:50:29.1 |
HIP 27477 |
19.53 |
| 2026-08-14 12:00 |
05:50:03.16 |
-10:51:07.8 |
HIP 27477 |
19.58 |
| 2026-08-15 00:00 |
05:50:06.15 |
-10:51:46.7 |
HIP 27477 |
19.66 |
| 2026-08-15 12:00 |
05:50:09.09 |
-10:52:26.0 |
HIP 27477 |
19.78 |
| 2026-08-16 00:00 |
05:50:11.97 |
-10:53:05.6 |
HIP 27477 |
19.94 |
| 2026-08-16 12:00 |
05:50:14.81 |
-10:53:45.5 |
HIP 27477 |
20.12 |
| 2026-08-17 00:00 |
05:50:17.60 |
-10:54:25.7 |
HIP 27477 |
20.34 |
| 2026-08-17 12:00 |
05:50:20.34 |
-10:55:06.3 |
HIP 27477 |
20.58 |
| 2026-08-18 00:00 |
05:50:23.03 |
-10:55:47.1 |
HIP 27477 |
20.86 |
| 2026-08-18 12:00 |
05:50:25.67 |
-10:56:28.2 |
HIP 27477 |
21.16 |
| 2026-08-19 00:00 |
05:50:28.26 |
-10:57:09.7 |
HIP 27477 |
21.48 |