메타데이터
| 항목 |
값 |
| Designation |
C/1966 R1 (Ikeya-Everhart) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1966-08-05T07:42:01.379520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:17Z |
| Obs used |
23 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1966-09-23.0000000 |
| e |
1.00004638 |
| q (au) |
0.881833 |
| a (au) |
-19014.652685 |
| i (deg) |
48.278876 |
| Ω (om, deg) |
107.658924 |
| ω (w, deg) |
50.044476 |
| M (ma, deg) |
0.000018 |
밝기
산란 + 전체 선형
$$
M_a = (6.490 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
6.490 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.982 |
| 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) |
| 2026-03-26 00:00 |
21:56:25.85 |
-41:50:03.0 |
HIP 108229 |
13.28 |
| 2026-03-26 12:00 |
21:56:27.26 |
-41:50:04.4 |
HIP 108229 |
13.50 |
| 2026-03-27 00:00 |
21:56:28.67 |
-41:50:05.9 |
HIP 108229 |
13.71 |
| 2026-03-27 12:00 |
21:56:30.06 |
-41:50:07.5 |
HIP 108229 |
13.93 |
| 2026-03-28 00:00 |
21:56:31.45 |
-41:50:09.2 |
HIP 108229 |
14.16 |
| 2026-03-28 12:00 |
21:56:32.82 |
-41:50:11.0 |
HIP 108229 |
14.38 |
| 2026-03-29 00:00 |
21:56:34.19 |
-41:50:12.9 |
HIP 108229 |
14.60 |
| 2026-03-29 12:00 |
21:56:35.55 |
-41:50:14.9 |
HIP 108229 |
14.82 |
| 2026-03-30 00:00 |
21:56:36.89 |
-41:50:17.0 |
HIP 108229 |
15.05 |
| 2026-03-30 12:00 |
21:56:38.23 |
-41:50:19.2 |
HIP 108229 |
15.27 |
| 2026-03-31 00:00 |
21:56:39.56 |
-41:50:21.5 |
HIP 108229 |
15.49 |
| 2026-03-31 12:00 |
21:56:40.87 |
-41:50:23.9 |
HIP 108229 |
15.72 |
| 2026-04-01 00:00 |
21:56:42.18 |
-41:50:26.3 |
HIP 108229 |
15.94 |
| 2026-04-01 12:00 |
21:56:43.48 |
-41:50:28.9 |
HIP 108229 |
16.17 |
| 2026-04-02 00:00 |
21:56:44.76 |
-41:50:31.6 |
HIP 108229 |
16.39 |
| 2026-04-02 12:00 |
21:56:46.04 |
-41:50:34.4 |
HIP 108229 |
16.62 |
| 2026-04-03 00:00 |
21:56:47.31 |
-41:50:37.3 |
HIP 108229 |
16.84 |
| 2026-04-03 12:00 |
21:56:48.56 |
-41:50:40.3 |
HIP 108229 |
17.06 |
| 2026-04-04 00:00 |
21:56:49.81 |
-41:50:43.4 |
HIP 108229 |
17.29 |
| 2026-04-04 12:00 |
21:56:51.04 |
-41:50:46.5 |
HIP 108229 |
17.51 |
| 2026-04-05 00:00 |
21:56:52.26 |
-41:50:49.8 |
HIP 108229 |
17.73 |
| 2026-04-05 12:00 |
21:56:53.47 |
-41:50:53.2 |
HIP 108229 |
17.95 |
| 2026-04-06 00:00 |
21:56:54.68 |
-41:50:56.7 |
HIP 108229 |
18.18 |
| 2026-04-06 12:00 |
21:56:55.87 |
-41:51:00.2 |
HIP 108229 |
18.40 |
| 2026-04-07 00:00 |
21:56:57.04 |
-41:51:03.9 |
HIP 108229 |
18.62 |
| 2026-04-07 12:00 |
21:56:58.21 |
-41:51:07.6 |
HIP 108229 |
18.83 |
| 2026-04-08 00:00 |
21:56:59.37 |
-41:51:11.5 |
HIP 108479 |
18.69 |
| 2026-04-08 12:00 |
21:57:00.51 |
-41:51:15.5 |
HIP 108479 |
18.52 |
| 2026-04-09 00:00 |
21:57:01.65 |
-41:51:19.5 |
HIP 108479 |
18.36 |
| 2026-04-09 12:00 |
21:57:02.77 |
-41:51:23.6 |
HIP 108479 |
18.20 |
| 2026-04-10 00:00 |
21:57:03.88 |
-41:51:27.9 |
HIP 108479 |
18.05 |
| 2026-04-10 12:00 |
21:57:04.98 |
-41:51:32.2 |
HIP 108479 |
17.90 |
| 2026-04-11 00:00 |
21:57:06.07 |
-41:51:36.6 |
HIP 108479 |
17.76 |
| 2026-04-11 12:00 |
21:57:07.14 |
-41:51:41.2 |
HIP 108479 |
17.62 |
| 2026-04-12 00:00 |
21:57:08.20 |
-41:51:45.8 |
HIP 108479 |
17.48 |
| 2026-04-12 12:00 |
21:57:09.26 |
-41:51:50.5 |
HIP 108479 |
17.35 |
| 2026-04-13 00:00 |
21:57:10.29 |
-41:51:55.3 |
HIP 108479 |
17.22 |
| 2026-04-13 12:00 |
21:57:11.32 |
-41:52:00.2 |
HIP 108479 |
17.10 |
| 2026-04-14 00:00 |
21:57:12.34 |
-41:52:05.2 |
HIP 108479 |
16.98 |
| 2026-04-14 12:00 |
21:57:13.34 |
-41:52:10.3 |
HIP 108479 |
16.86 |
| 2026-04-15 00:00 |
21:57:14.33 |
-41:52:15.5 |
HIP 108479 |
16.75 |
| 2026-04-15 12:00 |
21:57:15.31 |
-41:52:20.7 |
HIP 108479 |
16.65 |
| 2026-04-16 00:00 |
21:57:16.27 |
-41:52:26.1 |
HIP 108479 |
16.54 |