메타데이터
| 항목 |
값 |
| Designation |
C/2019 K4 (Ye) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-06-16T10:03:46.733760Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:42:41Z |
| Obs used |
609 |
| NEO |
- |
| M1 |
12.900 |
| K1 |
8.250 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-05-30T11:03:04.003200Z |
| Discovery magnitude (MPC) |
17.14 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2019-08-25.0000000 |
| e |
0.99906130 |
| q (au) |
2.259417 |
| a (au) |
2406.958686 |
| i (deg) |
105.305274 |
| Ω (om, deg) |
180.165129 |
| ω (w, deg) |
139.772154 |
| M (ma, deg) |
0.000581 |
밝기
산란 + 전체 선형
$$
M_a = (10.560 + 5.292\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.560 |
| n |
5.292 |
| gf |
0.999 |
| gb |
-0.735 |
| k |
0.992 |
| 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 |
08:24:56.19 |
-76:24:46.6 |
HIP 41079 |
7.30 |
| 2026-06-01 12:00 |
08:25:14.70 |
-76:23:22.2 |
HIP 41079 |
8.72 |
| 2026-06-02 00:00 |
08:25:33.32 |
-76:21:58.2 |
HIP 41079 |
10.25 |
| 2026-06-02 12:00 |
08:25:52.05 |
-76:20:34.6 |
HIP 41580 |
10.35 |
| 2026-06-03 00:00 |
08:26:10.89 |
-76:19:11.5 |
HIP 41580 |
8.97 |
| 2026-06-03 12:00 |
08:26:29.84 |
-76:17:48.8 |
HIP 41580 |
7.74 |
| 2026-06-04 00:00 |
08:26:48.89 |
-76:16:26.5 |
HIP 41580 |
6.74 |
| 2026-06-04 12:00 |
08:27:08.05 |
-76:15:04.6 |
HIP 41580 |
6.10 |
| 2026-06-05 00:00 |
08:27:27.30 |
-76:13:43.1 |
HIP 41580 |
5.92 |
| 2026-06-05 12:00 |
08:27:46.67 |
-76:12:22.1 |
HIP 41580 |
6.25 |
| 2026-06-06 00:00 |
08:28:06.13 |
-76:11:01.5 |
HIP 41580 |
7.02 |
| 2026-06-06 12:00 |
08:28:25.69 |
-76:09:41.4 |
HIP 41580 |
8.10 |
| 2026-06-07 00:00 |
08:28:45.35 |
-76:08:21.7 |
HIP 41580 |
9.39 |
| 2026-06-07 12:00 |
08:29:05.10 |
-76:07:02.4 |
HIP 41580 |
10.80 |
| 2026-06-08 00:00 |
08:29:24.96 |
-76:05:43.6 |
HIP 41580 |
12.31 |
| 2026-06-08 12:00 |
08:29:44.90 |
-76:04:25.2 |
HIP 41580 |
13.87 |
| 2026-06-09 00:00 |
08:30:04.94 |
-76:03:07.3 |
HIP 41580 |
15.47 |
| 2026-06-09 12:00 |
08:30:25.08 |
-76:01:49.9 |
HIP 41580 |
17.10 |
| 2026-06-10 00:00 |
08:30:45.30 |
-76:00:32.9 |
HIP 41580 |
18.75 |
| 2026-06-10 12:00 |
08:31:05.62 |
-75:59:16.4 |
HIP 41580 |
20.41 |
| 2026-06-11 00:00 |
08:31:26.02 |
-75:58:00.4 |
HIP 41580 |
22.09 |
| 2026-06-11 12:00 |
08:31:46.52 |
-75:56:44.8 |
HIP 42270 |
23.42 |
| 2026-06-12 00:00 |
08:32:07.10 |
-75:55:29.7 |
HIP 42270 |
23.17 |
| 2026-06-12 12:00 |
08:32:27.76 |
-75:54:15.1 |
HIP 42270 |
23.04 |
| 2026-06-13 00:00 |
08:32:48.51 |
-75:53:00.9 |
HIP 42270 |
23.03 |
| 2026-06-13 12:00 |
08:33:09.35 |
-75:51:47.3 |
HIP 42270 |
23.14 |
| 2026-06-14 00:00 |
08:33:30.26 |
-75:50:34.1 |
HIP 42463 |
22.98 |
| 2026-06-14 12:00 |
08:33:51.26 |
-75:49:21.5 |
HIP 42463 |
21.40 |
| 2026-06-15 00:00 |
08:34:12.33 |
-75:48:09.3 |
HIP 42463 |
19.84 |
| 2026-06-15 12:00 |
08:34:33.49 |
-75:46:57.6 |
HIP 42463 |
18.32 |
| 2026-06-16 00:00 |
08:34:54.72 |
-75:45:46.5 |
HIP 42463 |
16.84 |
| 2026-06-16 12:00 |
08:35:16.03 |
-75:44:35.8 |
HIP 42463 |
15.40 |
| 2026-06-17 00:00 |
08:35:37.41 |
-75:43:25.6 |
HIP 42463 |
14.04 |
| 2026-06-17 12:00 |
08:35:58.87 |
-75:42:16.0 |
HIP 42463 |
12.76 |
| 2026-06-18 00:00 |
08:36:20.39 |
-75:41:06.9 |
HIP 42463 |
11.61 |
| 2026-06-18 12:00 |
08:36:41.99 |
-75:39:58.3 |
HIP 42463 |
10.60 |
| 2026-06-19 00:00 |
08:37:03.66 |
-75:38:50.2 |
HIP 42463 |
9.80 |
| 2026-06-19 12:00 |
08:37:25.40 |
-75:37:42.6 |
HIP 42463 |
9.26 |
| 2026-06-20 00:00 |
08:37:47.20 |
-75:36:35.6 |
HIP 42463 |
9.02 |
| 2026-06-20 12:00 |
08:38:09.07 |
-75:35:29.1 |
HIP 42463 |
9.10 |
| 2026-06-21 00:00 |
08:38:31.00 |
-75:34:23.1 |
HIP 42463 |
9.49 |
| 2026-06-21 12:00 |
08:38:53.00 |
-75:33:17.6 |
HIP 42463 |
10.17 |
| 2026-06-22 00:00 |
08:39:15.06 |
-75:32:12.7 |
HIP 42463 |
11.07 |