메타데이터
| 항목 |
값 |
| Designation |
C/1999 K7 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1999-02-24T18:38:47.711040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:00Z |
| Obs used |
37 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
10.000 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1999-06-03.0000000 |
| e |
0.99652152 |
| q (au) |
2.322718 |
| a (au) |
667.740065 |
| i (deg) |
135.158550 |
| Ω (om, deg) |
50.330978 |
| ω (w, deg) |
104.660079 |
| M (ma, deg) |
0.005611 |
밝기
산란 + 전체 선형
$$
M_a = (14.412 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
14.412 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.733 |
| 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) |
| 2026-09-20 00:00 |
09:20:03.02 |
-30:25:58.6 |
HIP 45895 |
28.65 |
| 2026-09-20 12:00 |
09:20:04.91 |
-30:26:20.8 |
HIP 45895 |
28.10 |
| 2026-09-21 00:00 |
09:20:06.78 |
-30:26:43.0 |
HIP 45895 |
27.56 |
| 2026-09-21 12:00 |
09:20:08.64 |
-30:27:05.4 |
HIP 45895 |
27.02 |
| 2026-09-22 00:00 |
09:20:10.48 |
-30:27:27.9 |
HIP 45895 |
26.48 |
| 2026-09-22 12:00 |
09:20:12.31 |
-30:27:50.5 |
HIP 45895 |
25.94 |
| 2026-09-23 00:00 |
09:20:14.13 |
-30:28:13.2 |
HIP 45895 |
25.40 |
| 2026-09-23 12:00 |
09:20:15.93 |
-30:28:36.1 |
HIP 45895 |
24.87 |
| 2026-09-24 00:00 |
09:20:17.71 |
-30:28:59.1 |
HIP 45895 |
24.33 |
| 2026-09-24 12:00 |
09:20:19.49 |
-30:29:22.2 |
HIP 45895 |
23.79 |
| 2026-09-25 00:00 |
09:20:21.24 |
-30:29:45.4 |
HIP 45895 |
23.26 |
| 2026-09-25 12:00 |
09:20:22.98 |
-30:30:08.7 |
HIP 45895 |
22.72 |
| 2026-09-26 00:00 |
09:20:24.70 |
-30:30:32.1 |
HIP 45895 |
22.19 |
| 2026-09-26 12:00 |
09:20:26.41 |
-30:30:55.7 |
HIP 45895 |
21.65 |
| 2026-09-27 00:00 |
09:20:28.10 |
-30:31:19.3 |
HIP 45895 |
21.12 |
| 2026-09-27 12:00 |
09:20:29.78 |
-30:31:43.1 |
HIP 45895 |
20.59 |
| 2026-09-28 00:00 |
09:20:31.44 |
-30:32:07.0 |
HIP 45895 |
20.05 |
| 2026-09-28 12:00 |
09:20:33.09 |
-30:32:30.9 |
HIP 45895 |
19.52 |
| 2026-09-29 00:00 |
09:20:34.72 |
-30:32:55.0 |
HIP 45895 |
18.99 |
| 2026-09-29 12:00 |
09:20:36.33 |
-30:33:19.2 |
HIP 45895 |
18.46 |
| 2026-09-30 00:00 |
09:20:37.92 |
-30:33:43.4 |
HIP 45895 |
17.93 |
| 2026-09-30 12:00 |
09:20:39.50 |
-30:34:07.8 |
HIP 45895 |
17.41 |
| 2026-10-01 00:00 |
09:20:41.06 |
-30:34:32.3 |
HIP 45895 |
16.88 |
| 2026-10-01 12:00 |
09:20:42.61 |
-30:34:56.8 |
HIP 45895 |
16.35 |
| 2026-10-02 00:00 |
09:20:44.14 |
-30:35:21.5 |
HIP 45895 |
15.83 |
| 2026-10-02 12:00 |
09:20:45.65 |
-30:35:46.2 |
HIP 45895 |
15.30 |
| 2026-10-03 00:00 |
09:20:47.14 |
-30:36:11.1 |
HIP 45895 |
14.78 |
| 2026-10-03 12:00 |
09:20:48.62 |
-30:36:36.0 |
HIP 45895 |
14.26 |
| 2026-10-04 00:00 |
09:20:50.08 |
-30:37:01.0 |
HIP 45895 |
13.74 |
| 2026-10-04 12:00 |
09:20:51.52 |
-30:37:26.1 |
HIP 45895 |
13.22 |
| 2026-10-05 00:00 |
09:20:52.94 |
-30:37:51.3 |
HIP 45895 |
12.70 |
| 2026-10-05 12:00 |
09:20:54.34 |
-30:38:16.6 |
HIP 45895 |
12.18 |
| 2026-10-06 00:00 |
09:20:55.73 |
-30:38:41.9 |
HIP 45895 |
11.66 |
| 2026-10-06 12:00 |
09:20:57.10 |
-30:39:07.4 |
HIP 45895 |
11.15 |
| 2026-10-07 00:00 |
09:20:58.45 |
-30:39:32.9 |
HIP 45895 |
10.63 |
| 2026-10-07 12:00 |
09:20:59.78 |
-30:39:58.4 |
HIP 45895 |
10.12 |
| 2026-10-08 00:00 |
09:21:01.09 |
-30:40:24.1 |
HIP 45895 |
9.61 |
| 2026-10-08 12:00 |
09:21:02.38 |
-30:40:49.8 |
HIP 45895 |
9.10 |
| 2026-10-09 00:00 |
09:21:03.66 |
-30:41:15.6 |
HIP 45895 |
8.59 |
| 2026-10-09 12:00 |
09:21:04.91 |
-30:41:41.5 |
HIP 45895 |
8.08 |
| 2026-10-10 00:00 |
09:21:06.15 |
-30:42:07.4 |
HIP 45895 |
7.57 |
| 2026-10-10 12:00 |
09:21:07.37 |
-30:42:33.4 |
HIP 45895 |
7.07 |
| 2026-10-11 00:00 |
09:21:08.57 |
-30:42:59.4 |
HIP 45895 |
6.56 |