메타데이터
| 항목 |
값 |
| Designation |
C/2005 R4 (LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-03-08T00:19:13.751040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:52Z |
| Obs used |
491 |
| NEO |
- |
| M1 |
7.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2006-02-13.0000000 |
| e |
0.99748824 |
| q (au) |
5.188469 |
| a (au) |
2065.668817 |
| i (deg) |
164.012596 |
| Ω (om, deg) |
63.771672 |
| ω (w, deg) |
6.886614 |
| M (ma, deg) |
359.999758 |
밝기
산란 + 전체 선형
$$
M_a = (6.968 + 4.305\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.968 |
| n |
4.305 |
| gf |
0.874 |
| gb |
-0.884 |
| k |
0.999 |
| δ90 |
1.000 |
| 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 |
18:30:58.23 |
-13:45:41.6 |
HIP 90784 |
21.66 |
| 2026-09-20 12:00 |
18:30:57.45 |
-13:45:50.8 |
HIP 90784 |
21.56 |
| 2026-09-21 00:00 |
18:30:56.71 |
-13:46:00.1 |
HIP 90784 |
21.45 |
| 2026-09-21 12:00 |
18:30:55.99 |
-13:46:09.3 |
HIP 90784 |
21.34 |
| 2026-09-22 00:00 |
18:30:55.30 |
-13:46:18.5 |
HIP 90784 |
21.23 |
| 2026-09-22 12:00 |
18:30:54.64 |
-13:46:27.7 |
HIP 90784 |
21.13 |
| 2026-09-23 00:00 |
18:30:54.00 |
-13:46:36.9 |
HIP 90784 |
21.02 |
| 2026-09-23 12:00 |
18:30:53.40 |
-13:46:46.0 |
HIP 90784 |
20.92 |
| 2026-09-24 00:00 |
18:30:52.82 |
-13:46:55.2 |
HIP 90784 |
20.81 |
| 2026-09-24 12:00 |
18:30:52.27 |
-13:47:04.3 |
HIP 90784 |
20.70 |
| 2026-09-25 00:00 |
18:30:51.74 |
-13:47:13.4 |
HIP 90784 |
20.60 |
| 2026-09-25 12:00 |
18:30:51.25 |
-13:47:22.5 |
HIP 90784 |
20.49 |
| 2026-09-26 00:00 |
18:30:50.78 |
-13:47:31.5 |
HIP 90784 |
20.38 |
| 2026-09-26 12:00 |
18:30:50.34 |
-13:47:40.6 |
HIP 90784 |
20.28 |
| 2026-09-27 00:00 |
18:30:49.93 |
-13:47:49.6 |
HIP 90784 |
20.17 |
| 2026-09-27 12:00 |
18:30:49.55 |
-13:47:58.6 |
HIP 90784 |
20.06 |
| 2026-09-28 00:00 |
18:30:49.19 |
-13:48:07.6 |
HIP 90784 |
19.95 |
| 2026-09-28 12:00 |
18:30:48.86 |
-13:48:16.5 |
HIP 90784 |
19.83 |
| 2026-09-29 00:00 |
18:30:48.56 |
-13:48:25.4 |
HIP 90784 |
19.72 |
| 2026-09-29 12:00 |
18:30:48.29 |
-13:48:34.3 |
HIP 90784 |
19.61 |
| 2026-09-30 00:00 |
18:30:48.04 |
-13:48:43.2 |
HIP 90784 |
19.49 |
| 2026-09-30 12:00 |
18:30:47.83 |
-13:48:52.1 |
HIP 90784 |
19.37 |
| 2026-10-01 00:00 |
18:30:47.64 |
-13:49:00.9 |
HIP 90784 |
19.25 |
| 2026-10-01 12:00 |
18:30:47.48 |
-13:49:09.7 |
HIP 90784 |
19.13 |
| 2026-10-02 00:00 |
18:30:47.34 |
-13:49:18.5 |
HIP 90784 |
19.01 |
| 2026-10-02 12:00 |
18:30:47.24 |
-13:49:27.2 |
HIP 90784 |
18.89 |
| 2026-10-03 00:00 |
18:30:47.16 |
-13:49:35.9 |
HIP 90784 |
18.76 |
| 2026-10-03 12:00 |
18:30:47.11 |
-13:49:44.6 |
HIP 90784 |
18.63 |
| 2026-10-04 00:00 |
18:30:47.09 |
-13:49:53.3 |
HIP 90784 |
18.50 |
| 2026-10-04 12:00 |
18:30:47.09 |
-13:50:01.9 |
HIP 90784 |
18.37 |
| 2026-10-05 00:00 |
18:30:47.13 |
-13:50:10.5 |
HIP 90784 |
18.24 |
| 2026-10-05 12:00 |
18:30:47.19 |
-13:50:19.1 |
HIP 90784 |
18.10 |
| 2026-10-06 00:00 |
18:30:47.28 |
-13:50:27.6 |
HIP 90784 |
17.96 |
| 2026-10-06 12:00 |
18:30:47.39 |
-13:50:36.1 |
HIP 90784 |
17.82 |
| 2026-10-07 00:00 |
18:30:47.54 |
-13:50:44.6 |
HIP 90784 |
17.68 |
| 2026-10-07 12:00 |
18:30:47.71 |
-13:50:53.0 |
HIP 90784 |
17.53 |
| 2026-10-08 00:00 |
18:30:47.91 |
-13:51:01.5 |
HIP 90784 |
17.38 |
| 2026-10-08 12:00 |
18:30:48.14 |
-13:51:09.8 |
HIP 90784 |
17.23 |
| 2026-10-09 00:00 |
18:30:48.39 |
-13:51:18.2 |
HIP 90784 |
17.08 |
| 2026-10-09 12:00 |
18:30:48.67 |
-13:51:26.5 |
HIP 90784 |
16.93 |
| 2026-10-10 00:00 |
18:30:48.98 |
-13:51:34.8 |
HIP 90784 |
16.77 |
| 2026-10-10 12:00 |
18:30:49.32 |
-13:51:43.0 |
HIP 90784 |
16.61 |
| 2026-10-11 00:00 |
18:30:49.69 |
-13:51:51.2 |
HIP 90784 |
16.45 |