메타데이터
| 항목 |
값 |
| Designation |
C/1999 K4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-05-16T10:55:43.587840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
18 |
| NEO |
- |
| M1 |
18.500 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1999-05-20.0000000 |
| e |
0.91645495 |
| q (au) |
1.442437 |
| a (au) |
17.265376 |
| i (deg) |
120.773994 |
| Ω (om, deg) |
241.479276 |
| ω (w, deg) |
8.794388 |
| M (ma, deg) |
0.048698 |
밝기
산란 + 전체 선형
$$
M_a = (19.052 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.052 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.999 |
| 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) |
| 2026-09-20 00:00 |
03:58:13.08 |
+16:38:45.2 |
HIP 18609 |
18.50 |
| 2026-09-20 12:00 |
03:58:11.30 |
+16:38:33.9 |
HIP 18609 |
18.89 |
| 2026-09-21 00:00 |
03:58:09.48 |
+16:38:22.5 |
HIP 18609 |
19.29 |
| 2026-09-21 12:00 |
03:58:07.64 |
+16:38:11.1 |
HIP 18609 |
19.70 |
| 2026-09-22 00:00 |
03:58:05.77 |
+16:37:59.5 |
HIP 18609 |
20.12 |
| 2026-09-22 12:00 |
03:58:03.87 |
+16:37:47.9 |
HIP 18609 |
20.55 |
| 2026-09-23 00:00 |
03:58:01.94 |
+16:37:36.2 |
HIP 18609 |
20.98 |
| 2026-09-23 12:00 |
03:57:59.98 |
+16:37:24.4 |
HIP 18609 |
21.43 |
| 2026-09-24 00:00 |
03:57:57.99 |
+16:37:12.6 |
HIP 18609 |
21.88 |
| 2026-09-24 12:00 |
03:57:55.97 |
+16:37:00.7 |
HIP 18609 |
22.34 |
| 2026-09-25 00:00 |
03:57:53.91 |
+16:36:48.7 |
HIP 18609 |
22.81 |
| 2026-09-25 12:00 |
03:57:51.83 |
+16:36:36.6 |
HIP 18609 |
23.28 |
| 2026-09-26 00:00 |
03:57:49.72 |
+16:36:24.5 |
HIP 18609 |
23.77 |
| 2026-09-26 12:00 |
03:57:47.59 |
+16:36:12.2 |
HIP 18609 |
24.26 |
| 2026-09-27 00:00 |
03:57:45.42 |
+16:36:00.0 |
HIP 18609 |
24.76 |
| 2026-09-27 12:00 |
03:57:43.22 |
+16:35:47.6 |
HIP 18609 |
25.27 |
| 2026-09-28 00:00 |
03:57:41.00 |
+16:35:35.1 |
HIP 18609 |
25.79 |
| 2026-09-28 12:00 |
03:57:38.74 |
+16:35:22.6 |
HIP 18609 |
26.31 |
| 2026-09-29 00:00 |
03:57:36.46 |
+16:35:10.0 |
HIP 18425 |
26.48 |
| 2026-09-29 12:00 |
03:57:34.15 |
+16:34:57.4 |
HIP 18425 |
25.95 |
| 2026-09-30 00:00 |
03:57:31.81 |
+16:34:44.6 |
HIP 18425 |
25.43 |
| 2026-09-30 12:00 |
03:57:29.44 |
+16:34:31.8 |
HIP 18425 |
24.90 |
| 2026-10-01 00:00 |
03:57:27.04 |
+16:34:19.0 |
HIP 18425 |
24.37 |
| 2026-10-01 12:00 |
03:57:24.62 |
+16:34:06.0 |
HIP 18425 |
23.84 |
| 2026-10-02 00:00 |
03:57:22.17 |
+16:33:53.0 |
HIP 18425 |
23.31 |
| 2026-10-02 12:00 |
03:57:19.69 |
+16:33:40.0 |
HIP 18425 |
22.78 |
| 2026-10-03 00:00 |
03:57:17.18 |
+16:33:26.8 |
HIP 18425 |
22.25 |
| 2026-10-03 12:00 |
03:57:14.65 |
+16:33:13.6 |
HIP 18425 |
21.72 |
| 2026-10-04 00:00 |
03:57:12.08 |
+16:33:00.4 |
HIP 18425 |
21.19 |
| 2026-10-04 12:00 |
03:57:09.49 |
+16:32:47.1 |
HIP 18425 |
20.67 |
| 2026-10-05 00:00 |
03:57:06.88 |
+16:32:33.7 |
HIP 18425 |
20.15 |
| 2026-10-05 12:00 |
03:57:04.24 |
+16:32:20.2 |
HIP 18425 |
19.63 |
| 2026-10-06 00:00 |
03:57:01.57 |
+16:32:06.7 |
HIP 18425 |
19.12 |
| 2026-10-06 12:00 |
03:56:58.87 |
+16:31:53.1 |
HIP 18425 |
18.62 |
| 2026-10-07 00:00 |
03:56:56.15 |
+16:31:39.5 |
HIP 18425 |
18.13 |
| 2026-10-07 12:00 |
03:56:53.40 |
+16:31:25.8 |
HIP 18425 |
17.64 |
| 2026-10-08 00:00 |
03:56:50.63 |
+16:31:12.0 |
HIP 18425 |
17.17 |
| 2026-10-08 12:00 |
03:56:47.83 |
+16:30:58.2 |
HIP 18425 |
16.71 |
| 2026-10-09 00:00 |
03:56:45.00 |
+16:30:44.3 |
HIP 18425 |
16.26 |
| 2026-10-09 12:00 |
03:56:42.15 |
+16:30:30.4 |
HIP 18425 |
15.83 |
| 2026-10-10 00:00 |
03:56:39.27 |
+16:30:16.4 |
HIP 18425 |
15.43 |
| 2026-10-10 12:00 |
03:56:36.37 |
+16:30:02.4 |
HIP 18425 |
15.04 |
| 2026-10-11 00:00 |
03:56:33.45 |
+16:29:48.3 |
HIP 18425 |
14.68 |